Answer:
A (As far as my knowledge goes, I might be wrong)
Explanation:
A. Trade was increased, so this is the right answer
B. The European Christians did not win the Holy Land from the Muslims, so this is the wrong answer
C. Although art and music was inspired by the Crusades, it's subjective, and I'm assuming this isn't multiple choice.
D. The crusades was a fight over religion, this isn't even possible
Answer: the successful launch of the first artificial satellite
Explanation: so they can get better that the Soviet Union
Keeping Communism from spreading beyond the countries already under it's influence
B. Laws can change social prejudice
The Gulf of Tonkin is located on the eastern boarders of Vietnam.
