Sure! Here is the proper sequence from the given options:
c) National Defense Education Act is passed by Congress; launching of Sputnik; end of Korean War
Explanation:
1. The National Defense Education Act was passed by Congress in 1958 in response to concerns about the technological superiority of the Soviet Union after the launch of Sputnik in 1957.
2. Sputnik was the first artificial Earth satellite launched by the Soviet Union in 1957, which heightened tensions during the Cold War.
3. The Korean War ended in 1953 with the signing of the Korean Armistice Agreement, which brought a ceasefire to the conflict between North and South Korea.
This sequence follows a chronological order of events related to education, space exploration, and military conflict during the Cold War era.