Answer:
-It had existed all over the world in various forms for thousands of years
Explanation
even in egypt there was slavery
Can it be more than 1.
The Truman Doctrine was the event that triggered off the Cold War.
Explanation: Both parties were mutually hostile and did not believe in a possible peaceful coexistence anymore. The Americans and Soviets’ hostility to each other as well as the belief that they could no longer cooperate after the start of the Cold War resulted in the Berlin Blockade. Thus, I can conclude that the Truman Doctrine marked the start of the Cold War.
This one is pretty easy, emperor Constsntine, I think that's how you spell his name.
religion changed because of if you're a member of indulgence were sold in catholic churches luther and calvin were against it so they set up their own practices .An our lives our similar due to the negative affects that were applied
Answer:

Explanation:
➤ When a few companies dominate the market, it’s called Oligopoly
An Oligopoly is referring to when a few companies dominate, overpower or become more successful or larger than other companies or markets. It does not matter how powerful the dominated or dominating companies are. Oligopoly is simply referring to a few companies. Although only a few firms dominate, it is possible that many small firms may also operate in the market.
- Mordancy