Millions of slaves were brought from africa to north and south america to perform labor. which of the following was one of the jobs that many slaves performed in the americas?
a. they worked for colonial armies.
b. they worked as merchants.
c. they worked as artists.
d. they worked on plantations.

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

b) race riots in several cities