Answer:
A
Explanation:
It cannot be B because it has everything correct except it doesn't have a comma separating it.
C is not acceptable either, because there is an unnessasary comma before weekend. It also does not have a period at the end of the sentance.
D has no comma, and no period, so it wouldn't work either.
to
Let's do it
YES
Answer: Most teenagers do not get enough exercise and should be given the opportunity to get exercise while at school.
