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: Alex would often play devil's advocate. He 
Completion A: argued the opposite side of many arguments. 
Completion B: took up knitting. 
Completion C: was a serial killer. 
Completion D: thought that Satan was correct about a lot of things.
Completion A

Prompt: The agent pulls out a gun. The agent 
Completion A: shoots the transgressor.  
Completion B: eats the gun. 
Completion C: pulls out a rabbit out of his hat. 
Completion D: shoots photos of his wife.
Completion A

Prompt: John wanted to buy the new car but it costed an arm and a leg. John 
Completion A: cut off his arm and leg. 
Completion B: bought body parts. 
Completion C: couldn't afford the car. 
Completion D: decided to go for a run.

Completion C