A nurse is caring for a client who has multiple sclerosis and neurogenic bladder and is receiving bethanechol. The nurse should identify that which of the following client statements indicates a therapeutic action of the medication?

A. My mouth seems very dry lately. (Excessive salivation)
B. I've noticed my heart beating faster. (Hypotension and bradycardia)
C. I am able to urinate more freely.
D. I've noticed I can take a deep breath more easily.