Respuesta :
"Slaves became more important and valuable" "Southern attitudes about slavery hardened" "Cotton became the principal southern crop" "Cotton became a major U.S. export" and "Land under production declined" are all correct, since there was never a true caste system in the South.
Answer:
"Slaves became more important and valuable" "Southern attitudes about slavery hardened" "Cotton became the principal southern crop" "Cotton became a major U.S. export" and "Land under production declined"
Explanation: