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: The actor rehearses his lines with the understudy. The actor
Completion A: tells the understudy to make him a sandwich.
Completion B: runs into the lake.
Completion C: keeps messing up and swears out of frustration.
Completion D: tries to break the understudy's leg.
Completion C