When Admitting a New Patient with Alzheimer's to a Memory

When admitting a new patient with Alzheimer's to a memory unit of a long-term care facility, you note that she is prescribed both memantine and rivastigmine. What is your best action?

A) Give both drugs as prescribed.
B) Ask the patient when she usually takes these drugs.
C) Notify the prescriber that both drugs are for Alzheimer's disease.
D) Give the memantine one odd-numbered days and rivastigmine on even-numbered days.