Which heading best completes the partial outline below?

a. disputes over tariff rates
b. introduction of slavery into the territories
c. demands of abolitionists
d. disagreements over states rights
(1)reasons for the american system
(2)successes of third political parties
(3)causes of sectionalism
(4)justifications for economic reform

the recent bombing of the uss cole is one of many incidents of terrorism directed against the united states. more than 40 percent of the world’s terrorism is directed against u.s. targets.   pursue the alleged perpetrators through the criminal justice system, and still others would beef up intelligence capabilities. to deal with potential attacks involving weapons of mass destruction, some analysts advocate extending the reach of law enforcement agencies or spending more on domestic preparedness programs; others would encourage a policy of u.s. military restraint overseas to attempt to reduce the motivation for terrorist attacks on u.s. targets.

cherokee and arikara