Alan Notices Reduced Alertness and Reduced Cognitive Function Based on Battery

Alan notices reduced alertness and reduced cognitive function based on battery of behavioral tests. What mechanistic action of the benzodiazepine explains this effect?

A) Activation of BZ I sites in the cortex
B) Activation of BZ I sites in the hypothalamus
C) Activation of BZ II sites in the cortex
D) Activation of BZ II sites in the hypothalamus