It was deloped by which the peasants of Medieval Europe became dependent on their land and lords. I hope this helps!
The idea of the us gaining all land from one seaboard to the other is called manifest destiny the us gained these lands through several different purchases, annexations, and agreements such as the annexation of texas the treaty to give the us land in oregon below the 49th parallel and so forth.
The answer to to Part A is A. The main theme is to show someone Mercy to others even if they don’t deserve it.
The answer to Part B is B, if it’s not B it’s D