How did the cotton gin change agriculture in the south?
a. it combined cotton and wheat farms.
b. it encouraged textile factory construction.
c. it simplified the planting process.
d. it made cotton the dominant crop.

D. It made cotton the dominant crop.

Explanation:

In the southern United States, cotton began to be used as a commercial crop in the states of South Carolina and Georgia using the first roller ginners. In 1792, Eli Whitney invented the cotton gin, which mechanically separated the seeds from the cotton fibers, triggered a real revolution in the cotton processing industry and contributed to transform cotton into a dominant crop and the United States into the world's largest producer of cotton.

answer: they’re different

explanation: different people

the constitution gives congress the power to regulate commerce "among" the several states.