Final answer:
The nurse should be concerned if the client reports excessive tearing (option c) as an adverse reaction to propranolol.
Step-by-step explanation:
The nurse should be concerned if the client reports excessive tearing (option c) as an adverse reaction to propranolol, a beta blocker medication commonly used to treat hypertension. Excessive tearing is not a typical adverse reaction to propranolol and may indicate an allergic reaction or another serious side effect. Other common adverse reactions to propranolol include fatigue, dizziness, and gastrointestinal disturbances, but these are not listed as options in the question. Therefore, the best answer choice is option c, report of excessive tearing.