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: Ted was on thin ice with his girlfriend. He
Completion A: was worried one small movement would plunge them into the lake.
Completion B: had been caught badmouthing her friends.
Completion C: had thought ice skating would be a romantic date.
Completion D: looked for a glass for the ice.
Completion B