I believe it is A, semicolons as it separates the the thoughts as you're reading.
Answer:
The phrase “on cloud nine” is an idiom that means a person is feeling very happy or satisfied. Example: Will was in desperate need of a job. He applied at every possible place that he could in his town, but no matter what he did, it seemed like no one wanted to hire him.
I believe the answer is B
I am pretty sure the answers A.
The rest of them make no relation/sense to the question.
