Starting in the late 1300s, russian princes fought to drive out of russia. -the vikings -the serfs -the slavs -the mongols i think it is either vikings or the serfs what do you say?

What characteristic of the basin that feeds the congo river system affects movement in central africa? a. the center of the basin is a dense rain forest. b. it is the center of ethnic conflict in the area. c. wildlife on the savanna makes it too dangerous to travel. d. the basin is surrounded by desert.