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.
The passage talks about how cats like to get attention, sentence 4 states "<span>The little rascals always find ways to snag some affection and attention" which is the main idea of the whole passage.
