Which detail from the text is the BEST clue to the author's point of view?

According to sleep experts, more than three hours of

extra sleep on weekends doesn't help me.

It's time for schools to make a change to better suit

the inner clocks of teenagers.

When I was younger, getting eight to ten hours of sleep

each night was pretty easy to do.

Your body is naturally programmed to sleep at night

and wake in the morning.

"more than three hours of  extra sleep on weekends doesn't help me."

Explanation:

In the text, "more than three hours of  extra sleep on weekends doesn't help me." is the best clue to the author's point of view. The author's whole idea of the text is to let the readers understand the importance of getting the right amount of sleep for young people especially teenagers.He starts the text by mentioning the main point of the text and further elaborates how schools need to change their timings so that it would not affect the internal clocks of teenagers.The author says that since our bodies are programmed to sleep at night  and wake in the morning, teenagers should get the right amount of sleep everyday as extra sleeping hours on weekends doesn't really.