GMAT Sentence Correction (SC) | Re: In order to evenly and effectively paint a rough surface, it is necess

In order to evenly and effectively paint a rough surface, it is necessary to sand it and apply primer before applying the paint.
(A) it and apply primer before applying the paint
(B) it and prime it and paint it

sand, prime and paint are related actions..hence are a list..In the list, only the last element must have ", and"
Eliminate

Let me tell you there are no pronoun reference errors.

"it is necessary"---this "it" is a dummy one...such as "It is sunny now"

second and third "it" refers to "surface"

It may have refer to "paint" However, paint is used as a verb.