Instructions: 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.
Input: Prompt: A student is sitting in class. He 
Completion A: decided to become a train. 
Completion B: is doing his homework. 
Completion C: thinks the earth is flat. 
Completion D: is preparing dinner.
Output:
Completion B