As the manifest destiny is a belief that states it was God's will that Americans spread over the entire continent, and to control and populate the country as they see fit. in fact, it was used before civil war to validate the acquisition of continental territories like oregon, for example.This is the central idea that the author suggests by Cordilia's ideas in her letter.
1.) A.) Algernon eavesdrops on Jack while he's conversing with Gwendolyn.
2.) D.) I believe is the correct answer. Algernon made up the invalid Bunbury in order to travel into the country whenever he pleased.
Hope this helps!