Given the task definition and input, reply with output. 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: There are a large number of predators in the African Savanna. The impala
Completion A: is one of these predators.
Completion B: drove down the street.
Completion C: kills for sport in this ecosystem.
Completion D: is constantly aware of its surroundings to survive.
Completion D