Read the following passage from a novel.

To say we were hot would be an understatement. When you are hot, you can sweat. This air was so dry, it felt as if the desert was pulling all the moisture out of our bodies. We looked out on the dry, barren desert and saw nothing but sand for miles.

An illustration of the desert would bring out the meaning of which phrase from the passage?
A. "To say we were hot would be an understatement."
B. "When you are hot, you can sweat."
C. "This air was so dry, it felt as if the desert was pulling all the moisture out of our bodies."
D. "We looked out on the dry, barren desert and saw nothing but sand for miles."