Answer:
Online courses call for a greater amount motivation and self-discipline than a classroom-based course. A classroom has one or more instructors and peers, who can hold a student accountable for their course-work. In contrast, online courses involve setting our own goals, tracking progress and meeting deadlines.
Technological advancements, such as the beginning of the space race and things of that sort.
I believe it is unemployment. I think GDP and unemployment are the two main factors in the business cycle.