In reply to your letter of 10 May quoting us the prices of soy beans we are placing a

In reply to your letter of 10 May quoting us the prices of soy beans, we are placing a trial order as mentioned in the enclosed sheet.()

：A.现回复贵方5月10日大豆报价函，订购订单。

B.现回复贵方大豆报价函，试订购如所购订单。

C.现回复贵方5月10日报价函，试订购如所购订单。

D.现回复贵方5月10日大豆报价函，试订购如所购订单。

请帮忙给出正确答案和分析，谢谢！