The answer is the last choice, commonality.
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.
The 20th-century events include many notable events which occurred throughout the 20th ... Already in the 19th century, the United States had become an influential actor ... Many people saw this as the first stage of the end of the capitalist system and .... Three days later, Marshal Philippe Pétain surrendered to the Germans.
<span>The time period after the war of 1812 which saw only one political party was called the Era of Good Feelings. </span>
