Which statement describes a typical purpose of iRules?

iRules allow for deep inspection and manipulation of application traffic, including the ability to insert, delete, or modify specific bytes or control characters within an HTTP data stream using commands like HTTP::payload replace. This granular control over the raw data stream is a core capability of iRules for advanced traffic management.

iRules are not designed to dynamically update monitor timers based on server load; monitor settings are configured independently or through other load balancing features.

While iRules can examine server responses, removing a pool member based on an unexpected response is typically handled by health monitors, not by iRules directly affecting pool membership status.

This statement is incomplete; while iRules can choose a pool member, the ability to add individual control characters to a data stream is a more specific and fundamental demonstration of iRules' deep packet manipulation capabilities.