Answer:
3. Many major advances in technology and medicine occured during world war II
69 years old i hoped i helped
Answer: Because of bombs
Explanation: big boom booms
Former President John F. Kennedy is one of the America's greatest presidents due to his significant policies and measures that prevented a war between the United States and the Soviet Union. In addition, what makes him different to other administrations in combatting communism is that he makes use of the Peace Corps to third world countries to prevent the influence of the communists.