The answer is all of these
Answer:
On August 2, 1939, Albert Einstein sent a letter to President Roosevelt warning him of the certain possibility that the Nazi regime in Germany was developing the necessary technology to create weapons of mass destruction, specifically, high impact nuclear bombs. In addition, in this letter Einstein urged the president to develop the same type of technology, in order to counter the eventual fire power that Germany could reach if it achieved its objective.
Mark Twain would have most likely used the phrase as B) a period of ridiculous excess. During this period there was rapid economic expansion and growth, but this did not extend to the working poor. The wealth expansion also created very corrupt politics. These factors came to define this period as the "Gilded Age." Twain was very critical of this period and its economic and political characteristics.