Passage 1 indicates that socio economic progress for african americans has been slow because of

Based on Passage 1, slavery was the reason why socio-economic progress for African Americans has been slow.

During the 17th and 18th centuries, slavery was rampant throughout American colonies. Through the manufacture of lucrative crops like cotton and tobacco, the African slaves helped establish the new nation into a powerhouse of economy.

African Americans climbed into the upper middle class in large numbers during the 1980s.

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

the answer is option a.