Consider a consumer with preferences summarized by the utility function U(x,y) = 2x^0.5 + y^0.5. What is the expression for the consumer's MRS?

A) 2x^0.5 + y^0.5
B) 2x^0.5 - y^0.5
C) 2x^0.5 / y^0.5
D) 2x^0.5 * y^0.5