C
Reason - subject starts at sentence and followed by the subordinating sentence which is chandler yelling for help!
A complete predicate must start with a verb. 'The first day of the semester' is a complete subject. It is WHAT the sentence would be about. "With the new books and schedules in hand" is a prepositional phrase, which simply adds information to a sentence. "Because of the slamming of the lockers and the shouts of the students" is an introductory clause. "Could not be heard above the voices in the hallway" is the only complete predicate.
One thing i could share to help improve and have an effective study skills is to write down what you need to do. In this way it helps your brain to understand that what you wrote is the goal for the day. It will remind you not to procrastinate because it will remind you of what is needed to be done. It is fairly important to have an efficient study skills so that we can adapt and learn knowledge sufficiently.
