Julio Served in the War in Iraq and Was Severely

Multiple Choice

Julio served in the war in Iraq and was severely traumatized when a rocket propelled grenade exploded next to his Humvee. Recently, Julio was studying in the library and a large book fell off a high shelf and banged on the floor. The noise brought Julio instantly to his feet. In terms of classical conditioning, his response can best be explained by __________

A) spontaneous recovery.
B) negative reflex.
C) reinforcement.
D) generalization.