An example of ________ is federal officials forcing state officials to implement more stringent
Water pollution regulations.

A) home rule
B) preemption
C) police power
D) the doctrine of states' rights

Which of the following is the federal health-care program that covers U.S. residents over the age of 65?

A) Affordable Care Act
B) Social Security
C) Medicaid
D) Medicare
E) S-CHIP