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: Following a high-protein diet over a long period of time can cause considerable health problems. It 
Completion A: is therefore recommended that while dieting one should allow himself to eat once a week whatever he desires. 
Completion B: has been proved that this makes the dieter happy. 
Completion C: also helps the person to continue his diet. 
Completion D: must be addressed by a doctor
Output:
Completion A