Sometimes the french fries are rather pale, other times they are golden, sometimes they are quite dark. anna cooks them according to how much time she has available between customers. the variation in appearance can be attributed to

The variation in appearance can be attributed to the fact that there is no performance standard.

Explanation:

A performance standard can be described as a standard which is required for a task to be accomplished.

In the scenario discussed in the question, Anna does not have any performance standard. She can cook the French fries any way she likes. Hence, no performance has been set that her fries should be pale, golden or dark.

If a standard had been set, then Anna would have to make the fires according to the standard.

rain should be the answer.