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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: Three children walk home after school. As they approach their neighborhood, one of them 
Completion A: decides to study for a history exam. 
Completion B: learns to play piano. 
Completion C: tells a joke and they all laugh. 
Completion D: evaporates because of final exam pressure.
Output:
Completion C