Mateo Works as a Customer Service Representative at Asphalt Autos

Mateo works as a customer service representative at Asphalt Autos. He writes a letter to a customer who has recently become a member of the lifetime service club. Which of the following introductory statements written by Mateo best illustrates you-attitude?

A) You are now a lifetime service club member at Asphalt Autos!
B) You will be delighted to know that you have become a lifetime service club member at Asphalt Autos.
C) We at Asphalt Autos are glad to inform you that you are now a lifetime service club member!
D) I am sure you will be happy to know that you are now a part of our lifetime service club family.
E) It gives me pleasure to inform you that you are now in our lifetime service club!