A) Studies have shown that teenagers need more sleep than adults and that their bodies are biologically programmed to go to sleep later and wake up later.
B) Teens who start school early often don't have enough time to eat a healthy breakfast, which can lead to decreased concentration and poor academic performance.
C) Early start times often leave students feeling tired and unmotivated, which can lead to decreased engagement in classrooms.
D) Starting classes later in the morning can lead to increased attendance and better test scores.