I think it's C kkakkkkkqkkkkq
The steam boat
The cotton gin and others
Answer:
The Cold War was a period of geopolitical tension between the Soviet Union and the United States and their respective allies, the Eastern Bloc and the Western Bloc, after World War II. The period is generally considered to span the 1947 Truman Doctrine to the 1991 dissolution of the Soviet Union.
Explanation: