I think that the answer is b
By that reference to Claudius, Hamlet means that he and Claudius are relatives but not similar to each other. The correct answer is B.
It depends on how you worded your essay and what your views on global warming are, the way I would word it is "in conclusion global warming is real and changing drastically every minute, and we don't fully know exactly how it will affect the world long-term" that's one way you can say it.