Which sentence of the following expresses "the confimation of the order and happiness for concluding the business"
A、We are glad to have concluded business with you in the captioned goods
B、We appreciate your Order No. 235 for 500 sets of sewing machines, and are pleased to accept your terms.
C、 Enclosed we are sending you is the scanned version of our S/C No. ZH7452.
D、You are required to sign the sales conformation and fax it back for our file at your earliest convenience.