Answer:
Right choice:
e. contained a theater carved out of stone that seated up to 10,000 people.
Explanation:
As a result of economic growth during the 1950s, the percentage of Americans who were in the middle class "increased dramatically". This was due primarily to the fact that there were far more jobs available, since World War II had helped create them.
The victory at Saratoga was the battle after which Burgoyne surrendered his entire army, giving Americans the final element needed to win the Revolutionary War.
