What should these items include at a minimum?

Many items can be included in the e-mail order confirmation sent to a customer after an order is completed. What should these items include at a minimum?

A.
The date, an order summary and a shipping tracking number

B.
The customer name, the credit card number used and the total credit card charge

C.
A shipping address, an order summary and company contact information

D.
Links to more products, product promotions and coupons for future purchases