majors

What is the significance of Economics becoming a STEM? Does this change factor into how the major is weighted, if at all, for service selection? If Econ is now a STEM, how does it differ from the cousin Quantitative Economics?

What are some of the more difficult majors at the Naval Academy? I know the engineering ones are hard but how much harder compared to a civilian college? Also is it true that most people change from engineering to English or history or something?