What is the standard deviation of the returns on a $30,000 portfolio which consists of stocks S and T? Stock S is valued at $21,000.

State of Economy	Probability of State of Economy	Returns if State Occurs
		Stock S	Stock T
Boom	5%	11%	5%
Normal	85%	8%	6%
Recession	10%	-5%	8%

A. 2.07 percent

B. 2.61 percent

C. 3.36 percent

D. 3.49 percent