the state of wanting to know or learn about something or someone.
D, is states an opinion because it tells them waht they think he should do. "Rigo really should have spent more time on his English homework. The correct answer is D.
I think b, since it has the prefix of end, it most likely means that its the end and noting can be done about it.
The correct answer is D. An enjoyment of solitude. Both loved living in the outdoors and being alone with their thoughts in the woods. This can be seen in the work "Walden" by Thoreau.