Question

what is the main reason jilly researched the consequences of teens not getting enough sleep?

• to encourage young people to go to bed earlier
• to understand the effects of her own internal clock
• to learn about scientists who study teens sleep habits
• to show the board why its better to start school later

Explanation:

The most likely reason for researching the consequences of teens not getting enough sleep would be to advocate for a change beneficial to teens, like starting school later. The other options are less likely main - reasons for such research.

Answer:

to show the board why it's better to start school later