Which of the Following Would Be Most Effective as the Opening

Which of the following would be most effective as the opening statement for a message from a customer service executive of Weaver Designs to the customer, granting the claim?

A) Thanks for contacting us about the dress that you purchased from Weaver Designs. Even though the problem of fading arose from the fact that you washed the dress in hot water, instead of cold-as is spelled out in the washing instructions on the label-we are sending you a replacement.
B) The problem that you brought to our notice occurred because you washed the naturally dyed dress in hot water, instead of cold, as the instructions clearly explain. Nevertheless, we are mailing you a dress identical to the one you purchased.
C) Thanks for contacting us about the dress that you purchased from Weaver Designs. We are mailing you a dress identical to the one you purchased, even though the fading was a result of washing the naturally dyed dress in hot water in the machine.
D) At Weaver Designs, we take pride in making all of our clothes from natural, earth-friendly fabrics and dyes. However, to retain their colour and shape, these fabrics need to be washed gently in cold water, either in your machine or by hand, and laid flat to air-dry. From your email, it appears that you neglected to do so. Nevertheless, we are mailing you an identical dress.