Economy question

[biockout2003]

If investors’ expected future incomes increase and the demand fot financial capital increases, other things equal
A. the equilibrium interest rate will rise
B. the equilibrium interest rate will fall
C. these two factors wil have opposing effects on the equilibrium interest rate.
Correct answer :A
Why A is correct instead of B ?
Thanks

 

[TomHealey]

I guess it is easy to see if you for that kind of questions draw small graph, if you put D and S curves, and then move up D (increase in demand), ceteris paribus, you will see that equlibrium goes up along with interest rates.