Auditory hallucinations

A client on an inpatient psychiatric unit has had several episodes of auditory hallucinations.  Currently, the client is not having hallucinations and is interacting appropriately.  Which nursing assessment is a priority?

A. Client anxiety levels throughout the day

B. Compliance with medications over the past 6 months

C. Characteristics and tone of the last hallucination

D. Deficits in cognitive function