这句话中that指代什么？请大家帮帮忙

hbjat1989

8.  Lacking information about energy use, people tend to overestimate the amount 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 andmust 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


(D)  visible equipment, such as lights, that must beturned on and off and underestimate that


(E)   visible equipment, such as lights, that must beturned on and off and underestimate it when

答案是D米有问题. 想问的是 ：
这个that 指代的是什么呢？是不是前面的lights?
但是gmat又说同一句话中的同一个代词指代的东西要一致，而后面那个 that 指代的是“the amount of energy ”，怎么办啊？

FGHYU19912301

Bce中用it不对，因为that指代的是被不引人注意的器械所使用的能源数量，和之前的被可见的器械所使用的能源数量不是同一部分能源。

我觉得哈~~~

hbjat1989

哈哈，谢谢。老管说了，差不多就行了

hz032478

前面的that是引导定语从句，修饰的是前面的equipment，such as light是插入语，后面的that是代词，修饰the amount of energy，两个that词性不一样

larrylw

指代equipment