D “In the US, aggression is often directed toward other members of one’s own family,” is the best choice. It supports this statement by examples of parents abusing kids, as well as marital abuse. It’s not A or B, as it doesn’t focus on one or the other, and it’s not C because statistics about a rise or decline are not mentioned.
Paradoxes work by circularly falsifying the previous statement, and changing what the statement is asking.
