Q: Fact 1: Wind is used for producing electricity. Fact 2: Wind is caused because of pressure differences in the atmosphere. Given the two facts above, what can be used to produce electricity?

Available choices: A. Something that generates electricity B. an automobile engine C. The bending of a ray of light D. Something caused by pressure differences E. that material's properties F. energy of moving objects G. series of enzyme-mediated reactions H. Faulting of rocks in the crust
The answer is:
D.