Talk to your university's advisors for the particular majors your interested in and figure out which best is most suitable for you and is attainable. Your indecisiveness will not get you far, and thinking so far ahead without even getting through the first step will not benefit you either (eg. planning for your phD without even getting through your bachelors).
Read the advice you've gotten in your previous threads about the same topic.
Should I major in History?
Is it haram for me to major in Finance when Finance involves Riba?
I don't know what to major in...
Please be aware of the similar threads you keep creating and be courteous to those who have given you advice in the past by actually taking their advice and applying it to your life. I'm very keen on closing this thread, but i will spare you this time.