Answer:
Im not 100% sure on this, but i think its c or d. I'm leaning towards c.
Explanation:
If its in a certain order than most of the time you would be able to tell if the problem needs a solution. (I'm sorry I'm not the best at English.)
If people have tried to resolve it then obviously its gonna have a solution since others are already trying to solve it.
in that paragraph, the expression Mounting evidence could be a bit confusing, but it indicates that there's been reaserch about it before, and that it all points in the same direction, the more research proving the same point means the data is convincing. The answer is D.
Answer: Well, obama used some rhetorical devices such as climax, allusion and metaphor.
