C.
Starting school later in the morning would be beneficial for us teenagers. Waking up super early is hard for me and most of my friends. Studies show that teens naturally stay up later at night and need more sleep than adults. A one-hour later start time, like 8:00 a.m. instead of 7:00 a.m., would let us teens get more rest so we're awake and ready to learn.
This option provides specific details, including personal experience and a proposed start time, which helps to clarify and strengthen the argument. Additionally, referencing studies adds credibility to the claim about teens' sleep needs.