<span>One study showed that all of high school seniors said they had been in a vehicle with a drugged or drinking driver in the past two weeks.</span>
I think that the question is:
Which of the following would serve as support for this assertion? and apart from the first sentence, those are options.
and the answer is: both of the above. One sentence lists the benefits for the team and the other for the company.
Domestic tranquility is basically the people being happy with the country and not being in danger. They were concerned about it because without it, it could lead to revolts and revolutions.