I think it's A
Because that is the definition if it
Answer: Recycling of water already used waters by Californians may not be an option to cope with the drought because people will find it difficult to drink recycled water physiologically, and moreover, the marketing challenge far exceed the technological one.
Explanation:
A isn't correct because its singular and you use is not "are"
so your answer is A
I believe falling in love is a subconscious thing. The more and more you spend time with someone the more and more you realize you seem attracted to that person. It's kind of like discovering your favorite song. The more and more you listen to it the more you fall in love with it. You don't choose who you love, love chooses for you. Like cupid, it kinda just strikes, without warning. That's love, it inexplicably just feels right.
