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.

Example Input: Prompt: Professor Downey has solved the most difficult NLP problem. He is 
Completion A: sad that it was a difficult problem. 
Completion B: sad that he has solved the difficult problem. 
Completion C: very sad. 
Completion D: happy to have solved it.
Example Output: Completion D

Example Input: Prompt: Sally was on cloud nine after winning the competition. Sally 
Completion A: flew up high in the sky. 
Completion B: was sad. 
Completion C: was very happy. 
Completion D: had to train harder for the next competition.
Example Output: Completion C

Example Input: Prompt: five plus six is 
Completion A: six 
Completion B: one 
Completion C: five 
Completion D: eleven
Example Output:
Completion D