OG13 SC 第73题 求解惑 感谢！！

fiona581

Unlike the original National Museum of Science and Technology in Italy, where the models are encased inglass or operated only by staff members, the Virtual Leonardo Project, an online version of the museum, encourages visitors to “touch” each exhibit, which thereby activates the animated functions of the piece
(A)  exhibit, which thereby activates
(B)  exhibit, in turn an activation of
(C)  exhibit, and it will activate
(D)  exhibit and thereby activate
(E)  exhibit which, as a result, activates

正确答案是D。
OG的解释：
The relative pronoun which requires an antecedent, and there is none provided in this sentence. It makes more sense to make the visitors the agents responsible for the action of both the verbs—touch and activate. Because to “touch” is an infinitive, the second verb form must be, as well, though the to may be implied.

楼主选的是A。
楼主认为，which指代的是encourage visitors to “touch” each exhibit 这件事。但是官方说，句子里没有which指代的。
另外，为什么to 可以省略，不应该是对仗一致的吗？

按照一些大神的观点来看，不应该去抠语法点，应该去理解本句想表达什么，表达清楚了吗，逻辑在哪里。
楼主以上疑问都是在抠语法点（害羞），请高人指点我原句逻辑在哪里。

恳请大家指点！十分感谢！

lilyllll

GMAT中which不可以指代整句话，只可以指代近邻的名词或跳跃修饰的名词。to省略与否无伤大雅，我自己的看法是有时故意省略就是混淆视听，让大家找不到选项到底应该与谁平行。如何通过句意判断OG上讲的挺明白的。