Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Prompt: Two boys race their remote control cars around a track. They 
Completion A: love trains. 
Completion B: are very competitive. 
Completion C: want to run faster. 
Completion D: don't like school.
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Completion B