To Identify Medication Errors in a Patient's Orders,a Nurse Can

To identify medication errors in a patient's orders,a nurse can do which of the following? (Select all that apply. )

A) Clarify any unreadable or ambiguous orders with the prescribing physician.
B) Check the order in a medication Kardex.
C) Ask the patient about the medication.
D) Identify the medication with an old medication record.