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: Northwestern's Caesar system is the foundation of their student interface. That's because
Completion A: it handles loans, registration, and other essential services.
Completion B: Caesar is a robot that heckles students if they don't complete school requirements.
Completion C: Caesar controls their grades.
Completion D: Caesar was an Ancient Roman emperor who ruled at the apex of the empire.
[A]: Completion A

[Q]: Prompt: The boy bullies others, but only those he does not know.
Completion A: likes psychology.
Completion B: likes machine learning.
Completion C: is afraid of other people knowing his act.
Completion D: likes bullying those he knows.
[A]: Completion C

[Q]: Prompt: My relationship with my teacher is not very good. He
Completion A: gives me good grades.
Completion B: intimidates me.
Completion C: is my father.
Completion D: is very kind.
[A]:
Completion B