2- Consider the following program:

public class Product

{ private int price

; public void setPrice(int theprice)

{

price = thePrice; }

}

public class SpecialProduct extends Item

{ private int discount;

public void setDiscount(int theDiscount)

{ discount = theDiscount;

}}

public class Main{

public static void main(String[]args){

SpecialProduct product = new SpecialProduct();

}}

Which of the following compiles without a problem? Why?

a. product.discount = 20;

b. product.setDiscount(20);

c. product.setPrice(50);