The answer choice which best fits the function described in the task content is; Choice A; time(length).
<h3>Which would be a good name for the function?</h3>
It follows from the task content that the function takes the length of a race and returns the time needed to complete it.
On this note, it follows that the time taken is a function of the length of the race.
Hence, the appropriate name of the function is; Choice A.
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