Help I need ASAP!! Read the passage.

The old South rested everything on slavery and agriculture, unconscious that these could neither give nor maintain healthy growth. The new South presents a perfect democracy, the oligarchs leading in the popular movement—a social system compact and closely knitted, less splendid on the surface, but stronger at the core—a hundred farms for every plantation, fifty homes for every palace—and a diversified industry that meets the complex need of this complex age.

The new South is enamored of her new work. Her soul is stirred with the breath of a new life. The light of a grander day is falling fair on her face. She is thrilling with the consciousness of growing power and prosperity. As she stands upright, full-statured and equal among the people of the earth, breathing the keen air and looking out upon the expanded horizon, she understands that her emancipation came because through the inscrutable wisdom of God her honest purpose was crossed, and her brave armies were beaten.

–"New South” speech,
Henry W. Grady,
1886

All of the following were common sources of low-cost industrial labor in the Southern textile mills of the new South except

children.
African Americans.
recent immigrants.
American Indians.