The answer is b because the other ones are involved in environmental science
Bill Clinton wanted to preserve his reputation and didn't wanted the american troops killed.
The previous warning of the U.S. administration that they would intervene humanitarian motives only.
The U.S. first instinct was to deny the genocide so they didn't have to provide aid.
Answer:
NEW YORK WAS THE CAPITAL OF USA UNTIL IN LATE 19S WAS CHANGED TO WASHINGTON D.C . IT IS LARGEST AND MOST POPULAR CITY IN US TOO!