Get me the book that sits on the top shelf, is bright red, and very

baru is exactly correct.

TheSueBear, sonusaini1, azoz7, I'm happy to help. First of all, the source of the question is EmpowerGMAT, which is shown in the Tags of this topic.

When we open up a list of items, each item needs to be able to make sense on its own. The verbs need to be consistent in form/tense, as well. We can break these items up and test them.

(A) Get me the book that sits on the top shelf, is bright red, and very thick

Item 1: Get me the book that sits on the top shelf. - Cool, this makes sense. No problem.
Item 2: Get me the book that is bright red. - Yep. This is fine. We're looking good, so far.
Item 3: Get me the book that very thick. - Uh oh. This item doesn't have a verb, but our other two items have a verb. So this is not grammatically correct.

(B) Get me the book that sits on the top shelf, is bright red, and is very thick

Item 1: Get me the book that sits on the top shelf. Good.
Item 2: Get me the book that is bright red. Good.
Item 3: Get me the book that is very thick. Good! All three of these items have a verb and the verbs are all in present tense!

(C) Get me the book that sitting on the top shelf, is bright red, and very thick

Item 1: Get me the book that sitting on the top shelf. - WRONG. We don't have a working verb here.

(D) Get me the book that sits on the top shelf, bright red, and very thick.

Item 1: Get me the book that sits on the top shelf. - Good.
Item 2: Get me the book that bright red. - Okay this one is obviously wrong. But maybe you're thinking "Mike, we have a parallel structure and we're only listing our working verb in the first item, but it will apply to all of the other items." And to you I say, "I like where you're head is at. You understand your parallel structures, but I want to give it a shot and see if it makes sense."
Item 2 borrowing our first verb: Get me the book that sits bright red. Welp, no luck. "Sits bright red" makes not sense.

(E) Get me the book that is sitting on the top shelf, bright red, and very thick

(E) is similar to (D) in that it only has the working verb "is" in the first item, so we'll try to apply it to all 3 items and see if it makes sense.

Item 1: Get me the book that is sitting on the top shelf. - Good.
Item 2: Get me the book that is bright red. - Good.
Item 3: Get me the book that is very thick. - Good.

Both (B) and (E) make sense!!!

But hang on a second... if you look carefully, (E) is not consistent in it's verb tense.
Item 1: "is sitting" is in Present Progressive.
Item 2 and 3 are in Present Simple.
It is Grammatically Incorrect to not be consistent with our verb tenses in a list of items.

Eliminate E

Does all of this make sense? Any questions? I hope I this helps.