How do these sentences develop the idea in paragraph 5 that a teenager’s sleeping habits are not due to a lack of self-discipline? “NIH studies report a physiological tendency for teens to fall asleep at a later hour and to awaken at a later hour as well. [...] Indeed, one sleep expert confirms that many teens are not physiologically able to go to sleep until 10:00 or 11:00 p. m.”

They provide scientific evidence that explains why a teenager’s sleeping habits are often not voluntary.

They provide scientific evidence that explains why a teenager’s sleeping habits are often not voluntary.

They detail a proposal by a government agency to force school districts to change the starting times at high schools.

They detail a proposal by a government agency to force school districts to change the starting times at high schools.

They provide scientific evidence that explains why a teenager will not adjust to a traditional school schedule.

They provide scientific evidence that explains why a teenager will not adjust to a traditional school schedule.

They detail a proposal by a national health organization to further analyze the unique sleeping habits of teenagers.

They detail a proposal by a national health organization to further analyze the unique sleeping habits of teenagers.