Two Recent Presidents Exercised Unilateral Power in America's Gulf Coast

Multiple Choice

Two recent presidents exercised unilateral power in America's Gulf Coast region.First, President George W.Bush sent military units there in 2005 in response to Hurricane Katrina and associated flooding in Louisiana, Mississippi, and parts of neighboring states.A few years later, President Obama sent Coast Guard staff and teams to the same region, in response to the Deepwater Horizon explosion and oil spill.What allowed them to do this?

A) Responding to requests from state governors
B) Declaring states of emergency in the affected region
C) Various Supreme Court rulings about emergencies and executive power
D) Through congressional acquiescence