Imaging the affected system is the best way to protect evidence in a forensic investigation, because it creates a bit-by-bit copy of the original data that can be analyzed without altering or compromising the original source. Imaging preserves the integrity and authenticity of the evidence and allows for verification and validation of the results34. Powering down or rebooting the affected system can cause data loss or corruption, while protecting the hardware does not prevent unauthorized access or tampering with the software or data.
References: 3: CISA Review Manual (Digital Version), Chapter 6, Section 6.4.1 4: CISA Online Review Course, Module 6, Lesson 4

One of the challenges in developing a SLA for network services is finding performance metrics that can be measured properly and reflect the quality of service expected by the customer. Establishing a well-designed framework for network services is not a challenge, but a good practice. Ensuring that network components are not modified by the client or reducing the number of entry points into the network are security issues, not SLA issues. References: ISACA, CISA Review Manual, 27th Edition, 2018, page 333

Secure code reviews as part of a continuous deployment program are preventive controls. Preventive controls are controls that aim to prevent or avoid undesirable events or outcomes from occurring, such as errors, defects, or incidents. Secure code reviews are activities that examine and evaluate the source code of a software or application to identify and eliminate any vulnerabilities, flaws, or weaknesses that may compromise its security, functionality, or performance. Secure code reviews as part of a continuous deployment program can help prevent or avoid security issues or incidents from occurring by ensuring that the code is secure and compliant before it is deployed to production. The other options are not correct types of controls for secure code reviews as part of a continuous deployment program, as they have different meanings and functions. Detective controls are controls that aim to detect or discover undesirable events or outcomes that have occurred, such as errors, defects, or incidents. Logical controls are controls that use software or hardware mechanisms to regulate or restrict access to IT resources, such as data, systems, or networks.
Corrective controls are controls that aim to correct or rectify undesirable events or outcomes that have occurred, such as errors, defects, or incidents. References: CISA Review Manual (Digital Version), Chapter 3, Section 3.2