It’s either B or D I would say I really hope it’s not wrong
Answer:
A. Occurs more often in routine, physically demanding jobs.
Explanation:
The exchange that took place during this time was called the Columbian Exchange
Partly due to the failure of Reconstruction to provide racial equality, African Americans would be free but oppressed , second-class citizens well into the 20th century. Reconstruction after the Civil War was a failure.