Given a prompt and two completions from a language model, select the completion that is the most fluent with respect to continuing the prompt. Fluency is defined by coherency and ease of understanding, not necessarily grammatical correctness. Generate either Completion A or Completion B.
Q: Prompt: If I sell my old iPad for $200, I 
Completion A: 'll buy a new one for $300. But the new model isn't really a good replacement for my old one, and if you buy a new 
Completion B: can get a pretty nice refund on my next iPad purchase. It takes less than a week.   I'm not saying we should stop buying th
A: 
Completion A