Its c. high school students should be required to community services in order to graduate.
Answer:
(A)
Explanation:
You need to share the main article, as well.
I am pretty sure it narrows down to (A) or (D), and based on the context, I would say it is going to be (A).
I have assumed that the main article is about piggybacking and how it influences to implement habits.
I might be able to help better if I had the article in my disposal.
Answer:
Adjective:
of first importance; main
of the best possible quality; excellent.
(of a number) evenly divisible only by itself and one
Noun:
a state or time of greatest strength, vigor, or success in a person's life
I think the answer is TRUE
Hope it helps
