Answer:
Option: C. Columbia
Explanation:
The Columbia River provides more than one-third of all the hydroelectric power in the United States. Hydroelectric power plants located on the river with generating capacity and contributed approx 44% of the total hydroelectric power in the nation. The steep slopes of the Columbia River and its streams make it ideal for the production of hydroelectric power.
The answer is b because the other ones are involved in environmental science
So that people have to pay for their effort. As you know everyone in the community needs to earn money somehow in order to live.
Also used for copy protecting in short term to honor them as well
