It depends on you bud and what you want to do.

Accounting is a safe job with decent job security well until you reach the point of a controller and find yourself between the investors and the General Manager.  Talk about walking a line.  In all though it has a cap on income.  An accounting job usually means no travel or very little until you achieve controller status. Aqusitions is an area where accounting does travel alot but its actually pretty hard to break into usually on the investment bakning level.  These guys highly prefer MBAs and though the entry level pays very well you sure are a high priced gopher.   Self employment opportunities are pretty limited to tax returns and CPA independent book keeping.  Its a heck of alot of at desk work regardless of direction taken.  If you can take the assholes and lacky work of investment banking the opportunity is really in investment opportunities that you learn about and personal investment.  People who usually take this path are willing to work very hard and take a lot of shit to gain the insight to become financially independent through personal investments.  

Marketing is very muti-facisted.  An advertising job or in factory marketing job for example is a dead end job but does have about as much security as about any job you can have these days.  It typically requires little travel and heavy on desk work.  On the otherhand Marketing/Sales has no job security but the potential of almost no income cap or  potential for a higher return.  Self motivation is a key to this path to success.  This usually involves quite a bit of travel and not as much desk work well unless you take a VP Slot as Sales and Marketing Director then it combines both travel and desk.  Self employement opportunities are very high since the key to any business is the customer base and customer knowlege.  The higher end jobs here are typically heavy on travel and this gets old after a while but the financial gains pretty high.  Its often a profession where one has to define their limits in regards to personal life and stay there for you can climb as far as you want to climb.  Though the rewards are very high the job security is nil and you are only as good as your last order.

An international business degree is pretty ambiguous and really means nothing but what you make of it.  That pretty much means entry positions are rare or hard to find and once you do how far you climb dependes on what you make of it.  Like Marketing/Sales, which it could be, the higher end jobs would most likely involve international travel which is by far the hardest travel due to distance.  Getting yourself to that position would be pretty hard work, once you get there the reward would be good, but your travel time a pain in the ass after the "Oh wow" wears off.  

Your question could be a book but there's a first short pass.  I hope it helps some.

Tj