Answer: You should first determine your position, so the answer choice would be B.
Explanation: You cannot find supporting evidence until you know what position you are writing your thesis about. You cannot find reasons either for the same reason as evidence. Investigating why you have a position must come <em>after</em> determining your position.
The italicized word or phrase <em>a three-pronged </em>(if this is italicized, we cannot possibly know) is attributive, as it is an adjective to describe the plan.
Because nobody really Appreciate his work but when he told his I have a dream speech everybody got to know who he really was his kids and his wife was proud of him