What does clapping generally express?

Correct answer: Appreciation

Clapping is a non-verbal sound-and-gesture signal that commonly communicates appreciation, approval, encouragement, or support. For example, an audience may clap after a good performance or an effective speech. Although clapping can have different meanings in special cultural or situational contexts, appreciation is the standard meaning intended in this question. Fear, sadness, and uncertainty are not normally expressed by ordinary applause, so option B is correct.