B. Discuss the challenges faced by the African Americans after the
Civil War?​

Four million newly freed African Americans faced the future of previously-unknown freedom from the old plantation system, with few rights or protections, and surrounded by a war-weary and intensely resistant white population.

Explanation:

yes, since there is a positive and a negetive if the positive and negitive wasn't there wouldn't a flow electricity in it.

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

hope this !