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.
There is no sentences stated here-
Who is, that's the way they are using it
The participial phrase is crunching popcorn and this would modifie girl
