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.
A. Abuse of children by parents is widespread in the United States B. Aggression is part of many marriages in this country. C. In the United States, family violence is increasingly steadily. D. In the United States, aggression is often directed toward members of one’s own family.