(PHARM) A nurse is reinforcing teaching with a client who is taking benztropine to treat Parkinson's disease. The nurse should instruct the client to report which of the following findings as an adverse effect of the medication.

A. Difficulty voiding is an anticholinergic effect of benztropine and should be reported. Urinary retention is a known adverse effect and can lead to serious complications if unaddressed. B. A slow pulse (bradycardia) is not a common side effect of benztropine. C. Diarrhea is not typical; benztropine more commonly causes constipation due to its anticholinergic properties. D. Benztropine reduces salivation, so dry mouth is expected. Excessive salivation is not associated with this medication.