Why did the cost of slave labor double, even after the invention of the cotton gin?

A.
The demand for enslaved workers for the cotton fields was high, but the supply of workers was low due to the slave trade ban.
B.
Northern enslavers refused to sell their enslaved workers.
C.
Enslaved workers were in high demand for tobacco and rice farms.
D.
More enslaved workers were being freed at that point.

2 answers

In what year?

Decide which choices don't make sense and cross them out. Make your decision based on the choices left and what's written in your text.
It is A. Hope it helps!