Simple enough, you should base your decision on a major on your values, interests and skills. There are assessments out there to help you expand your options in majors. The Self-Directed Search is one of these assessments, you can look into it more online, it does cost $9.95, but is very informative and like I said, expands your options!
There are more assessments out there too! Hope that helps get you started. Ask yourself: "What am I good at, what do I like to do, what do I value?" (I know they are deep and tough questions) Good luck!