I think D but don’t count me on it!
Real GDP per capita for the United States is calculated by dividing real GDP by the number of people living in the country.
Space race was a race for world powers to reach space ahead of everyone else. The space race consisted with The U.S. and The U.S.S.R reaching space. Ultimately, The U.S.S.R won, but the U.S won by landing on the moon.
More than 3 million people (including over 58,000 Americans) were killed in the Vietnam War