A client with early-stage Alzheimer's disease is started on donepezil. The nurse is evaluating the caregiver's understanding of the medication and determines that the caregiver has understood the instructions when she makes which of the following statements?
a. "My husband will only need to take this medication once a day."
b. "This medicine will not affect his stomach and can be taken between meals."
c. "This medication will prevent my husband's memory problems from worsening."
d. "This medication may cause urinary retention. I'll monitor his intake and output."