Answer:
it is b. the civil war ended .
The countrys wanted to compete against each other for power/dominace
In the late 1800s, American cities suffered from serious environmental pollution due to the smokestack emissions from hydroelectric power plants. The correct answer is D.
The constitution explicitly assigns the president the power to sign or veto legislation, command the armed forces, ask for the written opinion of their cabinet, convene or adjourn congress, grant reprieves and pardons, and receive ambassadors.
