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.
Q: Prompt: People learn second languages because
Completion A: they want to talk to their parents.
Completion B: they are interested in them.
Completion C: they got nothing better to do.
Completion D: people forget a language every year so they need to learn a new one so they can talk.
A:
Completion B