Pay off student loan or purchase real estate

[Travis Vizier]

Without giving a lot of personal details, here is the situation:

Student loan $100,000
Monthly payment on student loan $1,000
Monthly income available to throw at student loan $3,000

Should I:
A) completely pay off student loan before attempting to jump into RE investing
B) pay off half , then begin
C) start now & use available profits to aid in the lowering of the student loans
D) Other

A little more info. For the past 6 mo I've averaged paying off around $3,000/mo. Other than a $115,000 mortgage I have no other debt.