What was the main effect of domestic and foreign policy changes during the early 2000s?
A. Federal efforts to monitor and fight terrorism at all costs increased.
B. New constitutional protections expanded Americans’ rights to privacy.
C. The federal government turned over responsibility for anti-terrorism efforts to the states.
D. The nation decreased its involvement in foreign wars in order to focus on safety at home.

the correct answer is A. Federal efforts to monitor and fight terrorism at all costs increased.

Explanation:

if you look at all the other answers, they are dead wrong! C is incorrect as National defense was never shifted to state level. D is also incorrect as USA had several major military interventions in Asia after 2000.

Option A is correct as after the September 11 attack on New York's world trade center, USA began to concern more about national security and terrorism, both domestically and internationally.

it's no easy i swear it's hard