The Item class contains a Public method named GetDiscount. The method is a Function procedure. An application instantiates an Item object and assigns it to a variable named cellPhone. Which of the following can be used by the application to invoke the GetDiscount method?

a. dblDiscount = Call cellPhone.GetDiscount

b. dblDiscount = cellPhone.GetDiscount

c. dblDiscount = GetDiscount.cellPhone

d. Call cellPhone.GetDiscount