Unilateral Sanctions by the U.S.government Are Usually

Unilateral sanctions by the U.S.government are usually:

A) effective because of the magnitude of the U.S.economy
B) effective because of the strength of the U.S.military
C) ineffective because the target of the sanctions can simply trade elsewhere
D) ineffective because the federalism allows individual states to circumvent the sanction's trading rules
E) effective because they inspire other countries to follow suit