I believe the second answer is correct .
He asked himself, “is this the best of all possible worlds?”
B.) change "have" to "has"
Answer:A compound sentence comprises two or more dependent clauses.
Explanation: A compound sentence is constructed by using a conjunction words to join two or more clauses together. The conjunction words such as but, because, whereas etc. e.g. I went to the market but I couldn't find what I wanted to buy. The woman was crying because she lost her job. They thought John is bad boy whereas he behaves well in the school.
