急救:一道语法题目!!!!:)谢谢(大全470)

Lacking information about energy use , people tend to overestimate the amout of energy used by equipment ,such as lights ,that are visible and must be turned on and off and underestimate that used by unobtrusive equipment,such as water heaters.

A equipment ,such as lights ,that are visible and must be turned on and off and underestimate that

B equipment ,such as lights,that are visible and must be turned on and off and underestimate it when

C  equipment, such as lights ,that is visible and must be turned on and off and underestimate it when

Dvisible equipment ,such as lights,that must be turned on and off and underestimate  that

E  visible equipment,such as lights ,that must be turned on and off and underestimate it when

E  错在哪里啊？谢谢

that 在这里指代　the amount of energy

it应该不能指代词组，还有，when加句子有些罗嗦

答案是什么？ D ？