The comma in the sentence above is used incorrectly because it <span>attempts to separate a compound predicate. The comma is incorrectly used to split a compound predicate which shares the same subject. The predicate must need equal access to the subject that's why no comma is needed.</span>
The answer is C. Please pay attention in SAT/ACT prep you won't believe how useful it is in the future, take it from someone who just took the SATs.
Its being explained in the sentence