Answer:
c. The destruction of southern cotton crops due to boll weevil
infestations.
Step-by-step explanation:
Cotton was among the most important crops in the agricultural south, and a nearly indestructible new insect species, known as the boll weevil devastated much of South America's cotton crop. In Alabama alone, cotton production decreased by 70 percent between 1914 and 1917. Southern agriculture has got a catastrophic hit and its labor force, mostly African American sharecroppers, has been found out of work. Thousands of black people went North in a mass exodus labeled the Great Migration,