試験CRT-450-JPN トピック4 問題127 スレッド

A. Public class CreditCardPayment extends Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
}

B. Public class CreditcardPayment extends Payment {
public override void makePayment(Decimal amount) { /*implementation*/ }
}

C. Public class CreditCardPayment implements Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
}

D. Public class CreditCardPayment implements Payment {
public override void makePayment(Decimal amount) { /*Implementation*/ }
}