A nurse is caring for a client who is having difficulty voiding following surgery. The nurse notes palpable bladder distention. Which of the following medications should the nurse anticipate administering to the client?

The correct answer is B: Bethanechol. Bethanechol is a cholinergic agonist that helps stimulate bladder contractions, promoting urine elimination. In this case, the client's bladder distention indicates urinary retention, which can be relieved by promoting bladder emptying with bethanechol. Lorazepam (A) is a benzodiazepine used for anxiety, not for urinary retention. Atropine (C) is an anticholinergic that would further inhibit bladder emptying. Furosemide (D) is a diuretic used for fluid retention, not for promoting bladder emptying.