I think it's D because A is correct B could be right and C is wrong. But the answer D is basically A and B combined. I know i explained that horribly but D should be correct.
did you mean main idea?
the main idea is the central, or most important, idea in a paragraph or passage.
The answer would be the third option, elusive. I hope this helped! :)
I’d say the 3rd option Overcoming Obstacles
Good luck
