A Client with Depression Is to Begin Treatment with an Antidepressant

A client with depression is to begin treatment with an antidepressant medication.In performing the initial assessment,what is the most important the nurse to ask?

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