Manjit is writing an argumentative essay to support her claim that her high school should not start classes before 9 a.m. This is one of her reasons.Teenagers learn better if they have had enough sleep.

The reason is that teenagers learn better when they have enough sleep. Choice A supports this idea by explaining that tired teenagers may be late or fall asleep in class, which interferes with learning. The other choices focus on possible problems with a later start time or suggest an alternative, rather than supporting the reason.

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