Read the sentence.

I saw Sienna sprinting down the final stretch in long, graceful strides. The cheetah chased her prey, which, in this case, was a first-place ribbon.

Which statement best interprets the meaning of the metaphor?

Sienna ferociously looked for food to eat.
Sienna raced against a very fast animal.
Sienna looked everywhere for a prize.
Sienna ran quickly and with purpose.