What second major should I choose?

[Mohammad Haidarasl]

I'm already attending school for a major of real estate, I'd like to add a second major (which I know you all would not recommend getting a degree in real estate at all necessarily to do this line of work), but if you did, which major, in your opinion would be best? I'll list a few here that I've considered...

Real estate bachelors with a second major in:

1) Economics?

2) Architecture? 

3) Mathematics?

4) Statistics?

5) fill in the blank? 

Which would be the most helpful? Please try not to discourage me and rather tell me what would most help me become successful in this field (and yes, I'd like to be an investor mainly)...

Thanks a bunch.