A,because Headings and subheadings represent the key concepts and supporting ideas in the paper. They show levels of importance.
Pearl Harbor is a place in Hawaii that was bombed on December 7, 1941 by the Japanese. Which caused the U.S. to enter World War II.
Answer: Gave European countries financial aid from the US
Explanation: I believe you meant to say Marshall Plan. This was after WWII. European countries were heavily damaged from the fighting, and served as an opportunity for communism to rise since the economy wasn't good. So, to contain the spread of communism and stop the Soviet Union from taking over more countries, the US gave more than $15 billion for financial rebuilding efforts.
There is a book called the history of atarturk check it out