A client with a cold is taking the antitussive medication benzonatate. Which assessment information indicates to the nurse that the medication is effective?

A. Denying coughing spells could indicate effectiveness, but the key indicator is improved sleep, which directly reflects reduced nighttime coughing. B. Being able to sleep through the night indicates the medication has effectively suppressed the cough, improving rest and reducing discomfort. C. Expectorating bronchial secretions is associated with expectorants, not antitussives like benzonatate, which are meant to suppress coughing. D. Reduced nasal discharge is more indicative of an antihistamine's effect rather than an antitussive like benzonatate.