Vhat argument did Southerners give in support of slave labor?

Explanation:

Defenders of slavery argued that the sudden end to the slave economy would have had a profound and killing economic impact in the South where reliance on slave labor was the foundation of their economy. The cotton economy would collapse. The tobacco crop would dry in the fields. Rice would cease being profitable.

the answer is a. 250 percent.

i belive the classic sword and a shield would do