How have nato's operations changed over time?
a. nato only direct peacekeeping measures now
b. nato no longer defend western europe
c. nato has fewer member countries now then when it began
d. nato's activities now include crisis management and peacekeeping

D. NATO's activities now include crisis management and peacekeeping.

The North Atlantic Treaty Organization (NATO) is an international military alliance between European and North American countries. The countries agree to mutual defense in case of an attack by an external party. Nowadays, the organization has 29 members, while an additional 21 countries participate in NATO's Partnership for Peace program.

becasue in the south they disallowed slavery but in the north slavery was illegial this boilled into because mexico wanted slavery

c

explanation: