I believe the answer is: C: The articles threatened national security
According to the national defense departement, publishing articles regarding Military tactics in vietnam war would potentially endanger the troops in vietnam. We cannot know if vietnam troops have any spies in national soil, so as a precaution, the articles is banned from being published.
The Korean War (1950-1953) began when the North Korean Communist army crossed the 38th Parallel and invaded non-Communist South Korea. As Kim Il-sung's North Korean army, armed with Soviet tanks, quickly overran South Korea, the United States came to South Korea's aid.
Discrimination: 1. D Racial attitudes and policies had been a part of American life for a long time and were not going to change easily
2. A, B, C Guatemala, Mexico, Puerto Rico
3. B, D Traditional family roles discouraged women from working outside the home and The Supreme Court repeatedly upheld gender discrimination
