Which of the Following Is Not an Explanation as to How

Which of the following is not an explanation as to how retributive terror groups use violence to achieve their goals?

A) Terrorists use violence to cause pain,notably casualties to frighten countries and bend their will.
B) Terrorists want to improve the U.S.economy to strengthen its ability to deteriorate international affairs.
C) Violence is used to attract the attention of potential recruits and supporters.
D) Some use violence to pursue their own,often local,goals and only receive some support and encouragement from international terrorist organizations.