In the 1880's, how were various European nations able to begin expanding into Africa and eventually gain control over most of the continent?
Africans lacked tribal unity
Europeans had better technology
the development of quinine helped fight African diseases
all of the above

c or d both can be the answer

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.

roosevelt essentially took the opposite approach as hoover in taking on the great depression. herbert hoover thought that america and its economy could naturally recover from the depression in due course, so he adamantly restrained the federal government from intervening on behalf of the people affected. on the other hand, roosevelt dramatically increased employment by expanding the federal government and establishing agencies that would aid in relieving some of the country's worst problems.