Final answer:
The client's statement indicating an understanding of advance directives is option C: 'My partner will need to be present if I become unresponsive.'
Step-by-step explanation:
The correct answer in this case is C. When the client states, 'My partner will need to be present if I become unresponsive,' it indicates an understanding of advance directives. Advance directives are legal documents that outline a person's healthcare preferences in the event that they are unable to communicate their wishes. In this case, the client recognizes the importance of having their partner present in case they are unresponsive, which may help ensure that their wishes are followed.