Why are andrew carnegie, john d. rockefeller, and j. p. morgan considered as "captains of industry"?

The term "robber baron" was applied to powerful nineteenth-century industrialists who were viewed as having used questionable practices to amass their wealth. On the other hand, "captains of industry" were business leaders whose means of amassing a personal fortune contributed positively to the country in some way. Another thing was, the wealthy elite of the late 19th century consisted of industrialists who amassed their fortunes as so-called robber barons and captains of industry. ... They made their wealth — and used it — in a way that would benefit society, such as providing more jobs or increasing productivity.

Explanation:

Plz give brainliest! :)

1) the answer is b

senators serve a six-year term; representatives serve a two-year term, making them more responsive to (and responsible for) voter confidence.

2) the answer is d

to serve as president, one must:   -be a natural-born u.s. citizen of the united states;   be at least thirty-five years old;   be a resident in the united states for at least fourteen years.

3) the answer is a

ella,because it is constitutionally eligible

4) the answer is c: the u.s president