Which Sentence Best Illustrates the Advice the Text Gives About

Which sentence best illustrates the advice the text gives about writing a negative message?

A) Because the watch was damaged, we will not be able to give you a full refund.
B) Although your GreenGrow LM96 lawnmower is no longer covered by warranty, I have enclosed a credit voucher of $50 toward the cost of having it repaired at the nearest authorized GreenGrow repair depot.
C) We're sorry that we cannot issue a refund for the full purchase price of the GreenGrow LM96.Please refer to the details of our warranty at HYPERLINK "www.greengrow.com" www.greengrow.com.
D) If you had read and saved the warranty information included with the GreenGrow LM96, you would know that the lawnmower is no longer covered by our refund or replacement guarantee.