Answer:
D. All of the above.
Explanation:
All of those things are ways that companies use to create energy.
Baron de Montesquieu believed in the separation of powers, which is included in the US Constitution. I hope this is what you are looking for.
In many ways racism was still prominent within the United States after the civil war. Many laws were set in place to keep African Americans below white Americans. These were known as the Jim Crow laws. Even after the Jim Crow laws were removed segregation and civil rights issues were common until the 1960’s.