Q: Given a prompt and four completions, select the completion that is the most plausible in continuing or answering the prompt. This task is designed to test common sense and has various categories ranging between idioms, negated statements, polysemy, subject referencing, and quantitative reasoning. Generate either Completion A, Completion B, Completion C, or Completion D.
Prompt: A boy sitting on his bed and has his laptop on his outstretched legs. He
Completion A: starts to shake his butt.
Completion B: jumps up in surprise.
Completion C: starts shaking his legs.
Completion D: starts to kiss himself.
A:
Completion C