Question

Which answer best describes how the cotton gin changed cotton farming?
The cotton gin caused cotton prices to drop because it could be harvested so easily.
The cotton gin added to the already high cost of producing cotton, and lowered demand.
The cotton gin made it easier to remove seeds from cotton, but destroyed the rest of the plant.
The cotton gin made growing cotton very profitable and increased the demand for slave labor.

Answer 1

I would go with "The cotton gin made growing cotton very profitable and increased the demand for slave labor."

Answer 2

The cotton gin made picking cotton more efficient.