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.
Q: Prompt: The man sold his old speakers to some students. They
Completion A: sold them right back to him for less.
Completion B: were bored when he decided to give a talk on campus.
Completion C: went to their apartment and set them up.
Completion D: decided to open a donut shop with a jukebox.
A:
Completion C