Persians have a great level of tolerance including letting strong empires to conquer them. The conquerer does not require them to change anything that would cause severe impact, so they allowed them. They respected the diverse groups of people and lived with them in their empire.
The competition between the United States and the Soviet Union for superiority in extraterrestrial exploration was called Space Race.
America had reason to compete against the Soviet Union in Space Race: Sputnik beat the United States to space in 1957, damaging its national pride and igniting fears of Soviet technology. The Soviet Union wanted space just as badly as the United States did. The Soviet Union and the United States differed in how they propagandized the Space Race, but they shared the common bond of actually having space programs.
The allied leader who used atomic bombs on japan was on Hiroshima and Nagasaki
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I think that the answer is C, becasue the Internet is a definite no. I don't know much about Dustball software. And D would not include much of someone else's work.