Which of the following statements is true about Andrew Carnegie, John D. Rockefeller, and Henry Ford? They used effective strategies to contribute to America’s rapid economic growth.

They used the assembly line to make their businesses more efficient.

They built monopolies and controlled the prices of certain goods.

They invested in small businesses to get started.

They used effective strategies to contribute to America's rapid economic growth.

Explanation:

Carnegie, Rockefeller, & Ford all used their industrial innovations and business empires to revolutionize modern society. They are also known as the "Men Who Built America"

the answer is b for brother

which statement best describes the relationship between the fourteenth amendment and the african american civil rights movement?