It can be inferred from the passage that Mann believe that America as an empire built on military domination alone will not succeed because ______.
A．the actual ability of Washington to use trade and aid as political leverage is severely limited.
B．its political and economic capabilities are less overwhelming.
C．the use of force turns the quest for empire into "overconfident and hyperactive militarism. "
D．its failure to secure the support of countries such as Angola, Chile, Guinea, Mexico, and Pakistan.