Us involvement in afghanistan, which began in 2001,

a) ended two months later.

b) ended six months later.

c) continued until 2005.

d) continued into the 2010s.

The correct answer is D, as US involvement in Afghanistan continued into the 2010s. The US involvement in the War in Afghanistan, which started after the World Trade Center attacks in 2001 with the purpose of taking out Al Qaeda, is still ongoing until today. Approximately 14,000 American servicemen are in Afghanistan, and to date it is not known when the US involvement in the conflict will end.

a system of cooperative federalism emerged, as the powers of the federal government expanded.