Which of the Following Sentences Presents the Bad News Most

Which of the following sentences presents the bad news most effectively?

A) To keep our costs low and our prices competitive, we give refunds only for unused merchandise returned within 30 days with a receipt.
B) Without a receipt, there is no way we can refund your purchase.
C) You obviously used the product, which means that you cannot receive a refund.
D) Many customers lose their receipts, but we still cannot refund your purchase.
E) We understand that you threw away the receipt because you planned to use the product, but that does not mean we can refund your money.