Final answer:
The client's adaptive use of suppression is indicated by response C: 'I avoid thinking about the problems that worry me until I have time to focus on a solution.' Suppression is an emotion-focused coping mechanism where the individual consciously avoids or delays dealing with the distressing thoughts or feelings.
Step-by-step explanation:
The client's adaptive use of suppression is indicated by response C: 'I avoid thinking about the problems that worry me until I have time to focus on a solution.' Suppression is an emotion-focused coping mechanism where the individual consciously avoids or delays dealing with the distressing thoughts or feelings. In this case, the client is actively choosing to avoid thinking about the problems until they have the time and mental capacity to find a solution.