One of the most widely used mechanisms for coordinating interactions and facilitating cooperation between states is (are) __________.

Extremely high control in laboratory settings

A) is always accomplished. B) is not useful. C) may lead to diminished external validity. D) is crucial in case studies.

While terrorism can be thought of as a different type of war, it is also a different type of

a. communication. b. weapon. c. diplomacy. d. enemy.