Which of the following sentences is grammatically correct?

Question

Quizplus · Accepted Answer

The errors in the other answer choices all involve misplaced modifiers.
Misplaced modifiers are words or phrases that are not located properly in relation to the words they modify (describe). To fix a misplaced modifier, we need to place the modifier next (or as close as possible) to the word or phrase that it modifies. In this example, that she had graded last night modifies the exams. So, we must place the modifier as close to the exams as possible. Otherwise, it sounds like the students were what the teacher graded.

Which of the Following Sentences Is Grammatically Correct