The Client Has Been Depressed, and the Physician Plans to Begin

The client has been depressed, and the physician plans to begin treatment with an antidepressant medication.In performing the initial assessment, what is the most important question for the nurse to ask?

A) "How long have you been depressed?"
B) "How much alcohol do you consume during the week?"
C) "Have you had any thoughts about killing yourself?"
D) "Are you allergic to any medications?"