21. According to the data in this chart, which two food plants were introduced to the Americas as part of the Columbian Exchange?

A. Corn and squash

B. Tobacco and coffee

C. Horses and rice

D. Oats and wheat

If anyone has done this test or knows this answer please help, I attached a photo

abraham lincoln, according to anyone who was connected with agriculture, represented the worst of northern politicians. shortly after lincoln was elected, south carolina seceded from the union. they along with other southern states, retained their anger. in a way, it was their own fault: the democrats were split in the south. some wanted slavery to be extended in other states that were about to join the union and some didn't want it badly enough. lincoln had a solid backing from his party: the republicans were united in not wanting slavery to be expanded.

a drastic rise in oil prices ended decades of postwar.

the answer is d. selective incorporation. (apex)

the commander in chief