Explanation
answer: A. Set the primary Citrix ADC to stay primary in the Configure HA Node settings and B. Set the secondary Citrix ADC to stay secondary in the Configure HA Node settings.
Short Explanation with reference:
When configuring a Citrix ADC high availability (HA) pair, the administrator can use the Configure HA Node settings to specify the preferred role of each node in the pair, either primary or secondary. This can prevent unwanted failovers or configuration synchronization issues, such as the one described in the scenario. By setting the primary Citrix ADC to stay primary and the secondary Citrix ADC to stay secondary, the administrator can ensure that the existing configuration on the primary node is preserved and replicated to the secondary node, and that the roles of the nodes are not reversed. The stayprimary and staysecondary options can be enabled or disabled by using the -stayPrimary and -staySecondary parameters in the CLI or by checking or unchecking the Stay Primary and Stay Secondary check-boxes in the GUI.
Therefore, the correct answer is A. Set the primary Citrix ADC to stay primary in the Configure HA Node settings and B. Set the secondary Citrix ADC to stay secondary in the Configure HA Node settings.
Configuring high availability node parameters | NetScaler

Explanation
answer: A. It replaces the date header in the HTTP response with the Citrix ADC system time in a conventional date format.
Short Explanation with reference:
A rewrite action is a set of rules that defines how the Citrix ADC appliance modifies the requests and responses that it processes. A rewrite action can use different parameters, such as target, expression, and pattern, to specify what part of the message to modify and how to modify it. The target parameter specifies the part of the message that is modified, such as the header or the body. The expression parameter specifies the new value that replaces the target. The pattern parameter specifies a string or a regular expression that matches the part of the target that is replaced.
In this scenario, the administrator configured a rewrite action as follows:
add rewrite action sync_date replace http.res.date.sys.time
This rewrite action uses the replace parameter, which replaces the entire target with the expression. The target is http.res.date, which is the date header in the HTTP response. The expression is sys.time, which is a built-in function that returns the Citrix ADC system time in a conventional date format, such as "Wed, 06 Sep 2023
12:45:12 GMT". Therefore, this rewrite action replaces the date header in the HTTP response with the Citrix ADC system time in a conventional date format. This can be useful for synchronizing the time between the server and the client, or for preventing caching issues.
Therefore, the correct way to interpret this rewrite action is A. It replaces the date header in the HTTP response with the Citrix ADC system time in a conventional date format.
Configuring rewrite actions | NetScaler : How to Configure Rewrite Action - Citrix Customer Support : How to Use Built-in Functions in Expressions - Citrix Customer Support

Explanation/Reference: