GWD7-Q31 仍然不解

Unlike the original National Museum of Science and Technology in Italy, where the models are encased in glass 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.

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 看了老帖讨论仍然不解 我只在C与D上有疑惑

1，有人说touch与activate是一先一后关系 那请问先后关系activate就要变成复数谓语了？

2，it不是指 museum encourages visitors to “touch” each exhibit 这件事吗？为什么C错？

哦 是哦 it只有是形式主语的时候才能指代句子的哦

那activate为什么没有s？

encourage visitors to touch and to activate  to可以省略

没有将来时，it指代也不对

encourage to touch可以理解 encourage to activate 觉得很怪啊..