When Answering the Phone for a Prescription Refill, Which of the Following

When answering the phone for a prescription refill, which of the following information is not necessary to obtain from the patient?

A) name of pharmacy to be called
B) name of desired medication, its strength, and last time refilled
C) how the patient is taking the medication
D) phone number at which the patient can be reached if necessary
E) what time the patient expects to pick the medication up from the pharmacy