Suppose Annabelle's favorite ice cream flavor, strawberry, costs $1.50 per cone and chocolate costs $1.00 per cone. If she receives 10 utils when she eats chocolate ice cream, how many additional utils would she need to get from eating strawberry ice cream to make her indifferent between purchasing the two flavors of ice cream?

A. 15

B. 10

C. 25

D. 5

E. 20