Czechoslovakia is correct. All others had been concered by Hitler and Nazi Germany.
The correct answer is A) The rebels were fighting for their independence because the United States did not give it to them. The Philippine's were in a constant struggle to gain independence after the Spanish stopped ruling the country. This led to the Philippine-American War, and even after both wars officially ended, some rebel groups continued to fight American soldiers. Many civilians died from starvation and disease in comparison to warfare deaths and English became the national language, instead of Spanish.
Both the Democratic and Republican Parties would support the idea that the United States should defend itself both in times of war and when it feels as though it's being threatened, since both parties believe deeply in national security.