信息来源与自我介绍的表达 — 国际贸易选择题

外贸函电中，若想表达“承蒙中国银行介绍，我们得知贵公司名称和地址”，最恰当的开头句是哪一句？ A. We owe your name and address to the Bank of China, through whom we have learned that you are exporters of textiles. B. We are the Bank of China and would like to introduce our company to you. C. Your name and address have been given to us by your company itself. D. We have sold your products for many years and now write to place an order with you.