What were the two goods traded between northern africa and the niger river empires?
a. gold and silver
b. slaves and salt
c. gold and salt
d. slaves and silver

Where did benjamin franklin travel to to seek aid for the colonists during the revolutionary war

How did the northern u.s. change during the 19th century? select the best choice from the answers provided. a. it became more industrial. b. it became more agrarian. c. it became less populated. d. it became less diverse

What are new social classes emerged due to advancement in agriculture ?