Answer: below
Step-by-step explanation:
1: Senator Beveridge believed that the future of America was imperialism and further expansion of America overseas. He says "The American people can not use a dishonest medium of` exchange; it is ours to set the world its example of` right and honor. We can not fly from our world duties; it is ours to execute the purpose of a fate that has driven us to be greater than our small intentions. We can not retreat from any soil where Providence has unfurled our banner; it is ours to save that soil for liberty and civilization." (March of the flag, Albert Beveridge). I believe he implies this as the way America will protect their future and their honor.
2: Mark Twain, through his comparison of imperialism to a business gamble, was trying to say that other nations are now becoming wary of the trade deals proposed to them by the colonies. They are now becoming aware of America's power and are cautious so they do not get caught up in a trading scandal.
3: Twain refers to the foreigners as the "People that Sit in Darkness" because slowly, they are coming out of the shadows and realizing the scam of imperial powers. Darkness, in this sense, is relating to someone not being educated or aware. For instance, if a certain nation was the "Person Sitting in Darkness", they would unaware of the unfair trade deals that are being made, according to Twain.