Which sentence from the article would be MOST important to include in a summary of the article? (A) The rapid expansion of cotton production after 1830 brought big changes to the Southern states. (B) Even within the horrible grip of slavery, enslaved Black people developed a culture of their own. (C) Southern men developed a code to ritualize their interactions with each other. (D) While more women in the North were becoming active in reform movements, Southern women remained bound to the home.