For question 1 the correct answer is:
B. Open and honest communication contribute to a happy relationship.
the subject Open and honest communication is plural then the verb agrees to it
For question 2 the correct answer is:
D. Interesting news<u> is</u> what sells our paper.
the subject Interesting news is singular, so the congujation of the verb BE "is" is the correct one.
I think the answer would be a because there would be more attention brought to the subject.
Explanation:
Conserving water is important because it keeps water pure and clean while protecting the environment. Conserving water means using our water supply wisely and be responsible. ... It is important that we must not pollute your water as many do not realize just how important and scarce water is.