Suppose a Teenager Has $20 and Likes Both Rap Music

Suppose a teenager has $20 and likes both rap music (R) and country music (C) with a set of preferences so that U = C^1/2R^1/2.Suppose that the iTunes price of a rap music song is and the price of a country music song is .What level of utility is unaffordable?

A) 6
B) 7
C)
D) 8