Answer:
C.
After grabbing her lunch and a breakfast bar, she heard the school bus.
Step-by-step explanation:
Sentence 4 in the paragraph has a dangling modifier. The subject of the modifier "After grabbing her lunch and a breakfast bar" is not clearly stated in the sentence. The correct answer shows a clear and effective way to revise sentence 4. The dangling modifier can be eliminated by making the subject of the modifier, "she," the subject of the sentence.