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. Benztropine, an anticholinergic medication, can cause urinary retention or difficulty with urination as a side effect due to its anticholinergic properties. Clients should be instructed to report any difficulty voiding promptly, as it can lead to complications such as urinary tract infections or bladder distention. B. Benztropine is not typically associated with diarrhea as an adverse effect. C. While anticholinergic medications can cause tachycardia (increased heart rate) due to their anticholinergic effects, they are not associated with slow pulse. D. Benztropine is used to decrease excessive salivation (sialorrhea) rather than causing it as an adverse effect.