The main reason for the passage of the National Security Act was to separate the armed forces into different departments. enable the nation to meet the challenges of the Cold War. prevent labor unions from striking during times of war. desegregate each branch of the nation’s armed forces.

B. enable the nation to meet the challenges of the Cold War.

Explanation:

a)scientists

explanation:

the national defense education act had two main goals. the first one was to provide personal that was oriented to defense, including scholars, engineering students and so on. the other goal was to provide financial assistance for the students who would be enrolling at colleges and universities in the 1960s.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.