Source: Official Guide for the GMAT 13th Ed. Sentence Correction; #73 Official Guide for the GMAT 2015 14th Ed. Sentence Correction; #73

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# Unlike the original National Museum of Science

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

### 3 Explanations

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My question is why to touch and to activate should be in paralle. Is it not a cause effect relation - act of touching is causing activation of animated function. If so, how are these 2 actions parallel?

Jun 22, 2016 • Comment

Cydney Seigerman, Magoosh Tutor

Hi there :)

Good question! These actions are in parallel since they are done by the same subject, the visitors. You can think about it in this way:

The Project encourages the visitors to touch the exhibit. The Project also encourages the visitors to interact with the artwork by activating the animated functions.

The Project encourages visitors to touch the exhibit and to interact with the artwork.

Do you see how the two verbs are in parallel now? I hope this clears things up :)

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Brahmpreet singh

Why activate, but not activates?

Feb 10, 2015 • Comment

Jonathan , Magoosh Tutor

"Activates" would be correct if it were the verb of the singular subject "Project." But it's not; we actually want "activate" to be parallel to "exhibit":

The Project encourages visitors to 1) "touch"...and thereby 2) "activate"

I hope this clarifies :)