D. high aspirations and high expectations because when you have high expectations and aspires. You get your hopes up thinking that what you think or dream of is gonna happen,and when it doesn't you get let down and it hits you hard, causing you to continuously be stressed out and depressed. Or in other words strained.
It is the League of Nations
The correct answer to this open question is the following.
The factor that played in the United state enjoying economic prosperity during the roaring '20s was that the country did not incur in big amounts of debt during World War 1, as Europeans countries did. Indeed, the United States loaned big sums of money to Western European countries to support the war effort. That is why the United States could live a period of economic prospeity in those years called "the Roaring 1920s," a period in which people had money or could buy using credit all the things they needed or they liked.