Actually the answer is D. A is missing a comma. B is too. C shouldn't have a common after the word famous.
Answer:
A
Explanation:
This line is not talking about his morals, or interests in general. So, from the given answers C and D are off the list from the possible answer. Now, because it says " not unacquainted", it is leaning toward the fact that he had basic or any kind of knowledge beforehand. So, the right answer indeed is A.
If the octopus is inside one of the boxes, it doesn't matter what you ask if trying to find out which box the octopus is BEHIND
