The west African empires of Ghana, Mali, and Songhai were able to thrive because

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.

besides the fact that abraham lincoln abolished slavery, and greatly benefit black people, he had a heavy impact of the definition of what democracy was, and should be.

the citation´s place is in position 4.

as carl becker

pointed out during the rise of european fascism after world war i

for democracy to prosper, it needs “a certain measure of economic security”

.

example (johnson 4)