【单选题】

Questions 147-149 refer to the following letter.

Dear Mr. Roosevelt,
I am very (147) to receive your inquiry.At your request, I am sending our newest brochure and a price list so that I can provide the details you asked for. (148) , I will send you, by a separate packet, a full range of samples. If you happen to have a chance to look into them, you will consent that the goods are both in excellent quality and at an affordable rate.
Please bear in mind that I would gladly allow you a discount of up to 20% on regular purchases in quantities of 2000 units and above.
I beg you (149) our other products and their details, which you will find in the brochure, and look forward to hearing back from you soon.
A、considering
B、consideration
C、considerate
D、consider