In an important study of american children by ullman and straus (2003), it was discovered that approximately percent of adolescents participated in child-to-parent violence during the previous 12 months.

10%

Explanation: In the study ,about the American children released in year 2003 describes about the child-to-parent assault records in one year (12 months).This study was done by Ullman and Straus. According to this study there were 10% cases that describes that the children are assaulting their parents in the form of verbal abuse, beating and other violence forms. This was a major violence issue at that time.This study revealed a major issue in the American society.

texas governor sam houston opposed secession, but was unable to prevent it. in this speech, given prior to lincoln's election, he presents the argument that slavery would be safer within the united states than outside of it. it was a prescient argument, and one held by several other southern leaders.

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using the scientific method.