Using Java code, how would you create an interface Discount Policy?
A. public interface DiscountPolicy { double computeDiscount(int count, double itemCost); }
B. interface DiscountPolicy { void computeDiscount(int count, double itemCost); }
C. public interface DiscountPolicy { void computeDiscount(int count, double itemCost); }
D. interface DiscountPolicy { double computeDiscount(int count, double itemCost); }