Which of the following is not the method of avoiding the delivery scams?

A、Use the delivery tracking information emailed to you after making your order.;
B、Don't click on any links or download any attachments in unwanted email that asks you to provide sensitive information because of the problem with the delivery.;
C、Use trusted sellers, be cautious about how you make your pruchase.;
D、If you have delivery questions, refer to the online receipt you received after you purchase and make contact through an official contact.