At the state level, state boards of education set standards for school courses. they decide what students need to learn in each subject. why do states have this power, and why might the state want to set schools standard?

The state set school standards to guarantee two things: first that the graduate will possess basic knowledge to solve the problems of his or her life. Second, to guarantee that graduate's employer that he or she will be prepared for the labor market.

Explanation:

The school standards are a set of characteristics built upon the opinions of many experts regarding the competences a person must have after a certain grade of education. Those competencies guarantee that the graduate is going to be a prepared individual to perform different tasks according to his or her age. Thus, basic education comprehends high school as the ultimate level to be taught before entering the general labor market.

i believe the answer is c

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.