Which non-verbal cue is allowed to indicate a time-related signal under the rules?

• A. A clap to signal completion.
• B. A raised hand gesture indicating time is up.
• C. A wave to indicate go.
• D. A thumbs-up to approve.

Answer: (B)

The main idea here is using a silent, unambiguous signal to show a time status. Raising a hand to indicate that time is up is the clearest way to convey “stop, time’s finished” without speaking or making noise, which fits the silent rule perfectly. Clapping would break the silence, so it isn’t allowed. A wave to go is about starting or directing action, not signaling the end of time. A thumbs-up shows approval, not a time status. So the raised hand neatly communicates the time-up signal in a way everyone can understand.