You should be able to eliminate both answer C and D, as neither of these topics were discussed in the article, which leaves you with answers A and B. Both of these arguments were talked about in the article, but the keyword in answer A is that the later start time COULD encourage students to go to bed early. However, in the article Signal provides some statistics that go against this, as most high school students would take the opportunity to stay up later, as they now had an extra hour to work with, rather than doing more productive things or getting extra sleep. So, this leads us to answer B, which is talked about in the article as well. People argue that high school starting times should be later, in order for teenagers to get adequate sleep that they would otherwise be restrained of, due to lack of melatonin being produced in their bodies. Also, as I mentioned earlier, most students would take the opportunity to mess around, rather than getting adequate sleep. With all said, answer B would be the correct answer.
