It would be the fourth one, he had few resources to fight off challengers.
But for the United States, particularly due to the timing of the victory at New Orleans, the War of 1812 restored the nation's honor. ... Because of westward expansion and economic prosperity, the years immediately following the war would be labeled as the Era of Good Feelings.
The answer is B.
This historian would be using the skill of "comparative analysis," since he or she is comparing a wide variety of sources to draw a conclusion between them as a group.
