Energy that comes from the sun—solar energy—is clean. It does not cause pollution the way energy from fossil fuels (like gas and oil) does. However, solar energy must be collected before it can be used. The instruments used to collect solar energy are quite costly.

This paragraph states that solar energy ________.

A) causes a lot of pollution
B) is expensive to collect
C) is one kind of fossil fuel
D) is a cheap way to get energy