They're both definitely unreliable, but the second answer(B) it doesn't seem like the narrator of "The Black Cat" seems insane, so I'm gonna think its D. I might be wrong though...
A type of critical thinking
(Apex) she does not see anything wrong with it.
a) mr.white doubts that the monkey's paw can really grant wishes.
It would be a) because Mr. White is in a way fighting with his mind.
It's more internal than the rest because:
b) is a man vs. man conflict
c) is also a man vs. man conflict
d) is a man vs. environment conflict
Hope I was able to help at least a little bit :)
I think Although would be the correct answer