Why Did Manufacturers Claim They Left Northern Cities During the 1980s

Why did manufacturers claim they left northern cities during the 1980s for the South and West?

A) They disliked hiring blacks and Latinos who were the majority of laborers in the northeast.
B) They wanted to establish well-organized, union-run shops.
C) They sought a cheap labor supply and lower taxes.
D) Those regions offered incentives to lure businesses to relocate.
E) All of these choices.