Sensitivity labels are a preventive security application controls, such as are firewalls, reference monitors, traffic padding, encryption, data classification, one-time passwords, contingency planning, separation of development, application and test environments.
The incorrect answers are:
Detective security controls - Intrusion detection systems (IDS), monitoring activities, and audit trails.
Compensating administrative controls - There no such application control.
Preventive accuracy controls - data checks, forms, custom screens, validity checks, contingency planning, and backups.
Sources:
KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 7: Applications and Systems Development (page 264). KRUTZ, Ronald & VINES, Russel, The CISSP Prep Guide: Gold Edition, Wiley Publishing Inc., 2003, Chapter 7: Application Controls, Figure 7.1 (page 360).

Section: Analysis and Monitoring
Explanation/Reference:
Misuse detectors compare system activity, looking for events or sets of events that match a predefined pattern of events that describe a known attack. As the patterns corresponding to known attacks are called signatures, misuse detection is sometimes called "signature-based detection." The most common form of misuse detection used in commercial products specifies each pattern of events corresponding to an attack as a separate signature. However, there are more sophisticated approaches to doing misuse detection (called "state-based" analysis techniques) that can leverage a single signature to detect groups of attacks.
Reference:
Old Document:
BACE, Rebecca & MELL, Peter, NIST Special Publication 800-31 on Intrusion Detection Systems, Page 16.
The publication above has been replaced by 800-94 on page 2-4
The Updated URL is: http://csrc.nist.gov/publications/nistpubs/800-94/SP800-94.pdf

Section: Risk, Response and Recovery
Explanation/Reference:
A post-mortem review meeting should be held with all involved parties within three to five working days of completing the investigation of the intrusion. Otherwise, participants are likely to forget critical information.
Even if it enabled an organization to validate the correctness of its chain of custody of evidence, it would not make sense to wait until prosecution is complete because it would take too much time and many cases of intrusion never get to court anyway.
Source: ALLEN, Julia H., The CERT Guide to System and Network Security Practices, Addison-Wesley, 2001, Chapter 7: Responding to Intrusions (page 297).

After a test has been performed the most useful test results for manangement would be knowing what worked and what didn't so that they could correct the mistakes where needed.
The following answers are incorrect:
elapsed time to perform various activities. This is incorrect because it is not the best answer, these results are not as useful as list of successful and unsuccessful activities would be to managment.
amount of work completed. This is incorrect because it is not the best answer, these results are not as useful as list of successful and unsuccessful activities would be to managment.
description of each activity. This is incorrect because it is not the best answer, these results are not as useful as list of successful and unsuccessful activities would be to managment.

Explanation/Reference:
A momentary power outage is a fault.
Power Excess
Spike --> Too much voltage for a short period of time.
Surge --> Too much voltage for a long period of time.
Power Loss
Fault --> A momentary power outage.
Blackout --> A long power interruption.
Power Degradation
Sag or Dip --> A momentary low voltage.
Brownout --> A prolonged power supply that is below normal voltage.
Reference(s) used for this question:
HARRIS, Shon, All-In-One CISSP Certification Exam Guide, 3rd. Edition McGraw-Hill/Osborne, 2005, page 368.
and
https://en.wikipedia.org/wiki/Power_quality