According to data published by the U.S. Department of Education, business has been the most popular major at the undergraduate level for over a decade. f you’re looking for the added convenience of an online degree so that you can study while working and/or attending to other personal obligations, this college rankings list should be a good starting point for your college search. Here, we look at 25 of the most affordable online bachelor’s degrees in business and closely-related topics (business studies).