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.
(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
我不理解C选项。这里OG给的解释是因为touch是动词所以it不能指代。指代Project和exhibit也可以都排除。那为什么不能指代to touch each exhibit这个呢？就想it is adj. to do.. 这里的it不是也可以指代to do么？希望好心人帮忙答一下… | 
