The truman doctrine was a plan to stop the spread of air pollution

This is false. The Truman Doctrine was created in hopes of stopping the spread of communism after a World War II. In this doctrine, Truman pledged $400 million of aid to the countries of Turkey and Greece. These two countries were in jeopardy of falling to communism due to their close location to the Soviet Union.

It is c because it shows how the author is stating their own oppinion about the protagonist