Choosing the right Career path

Hi everyone,

I'd like to ask anyone who's reading this to try and help me - either with advice, or with clear examples. Thank you in advance.

I am a member of Grinnell Class of 2015, and I plan on majoring in economics and doing the 3-2 program with Columbia.

My dream job is something that has a lot of interaction with people, especially negotiating, persuading etc. ; currently, I'm torn. From all of the career placement tests I did, most of them said that I should be in law, sales, marketing, and business in general. I would enjoy being a stockbroker the most (that's what I'm leaning towards) - I like risk-taking, selling and the stock market (which for me is a living, breathing organism).

There's option (A) - BA in Econ from Grinnell, and BS from Columbia in (Financial?) Engineering There's option (B) - BA in Econ from Grinnell double majored with Math and offcampus study in London School of Economics and There's option (C) - BA in Econ from Grinnell double majored with Pol Sci and offcampus study

Can any of the senior members, anyone with any sort of experience and hindsight give me any advice on this? Which option would you think is the best, supposing I have an equal interest in all three? Sorry for the wall of text,

Thank you once again in advance, D.