I believe the correct answer is A, because it effectively combines the meaning of the sentences that were given.
Hope this helps!
It depends on what you see. This question is more of asking you for your view. For example, i will give you one of my concerns of this world: hatred. reasons, many. War is another. You can use these two if you want but try at least brainstorm on what you see for the 3rd problem
hope this help ^^
