When President Obama Took Office, Why Did He Emphasize Using

When President Obama took office, why did he emphasize using soft power over use of the military to settle foreign policy disagreements?

A) Soft power is more likely to be successful.
B) Soft power is more likely to halt nuclear proliferation.
C) Soft power is less likely to lead to multilateralism.
D) Soft power is more likely to restore America's image and standing in the world.
E) Soft power is less likely to be appropriate for trade disagreements.