Read the following passive sentence:

Pessimism is smart; by expecting the worst you are able to plan for trouble and avoid it.

Which revision below is an active sentence?

A•Pessimism is smart; you are able to plan for trouble and avoid it by expecting the worst.

B•Smart pessimism expects the worst; you plan for trouble and avoid it.

C•Pessimism is smart; expecting the worst lets you plan for trouble and avoid it.

D•When you planned for trouble and avoided it, you were proving that pessimism is smart.