Which of the following statements about the dark reactions is true?

a. dark reactions occur in the thylakoids of chloroplasts.
b. light energy is converted to chemical energy during the dark reactions.
c. carbon dioxide is converted to sugar using atp and nadph during the dark reactions.
d. all of the above

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.