The first europeans to trade african slaves in the americas were the a. spanish c. british b. dutch d. portuguese

supplies had to travel a long distance across water on ships that were often attacked, so they did not reach europe

the indians crossed artificial boundaries, setting the stage for conflict

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain

d) true or false question