Lloyd's, an association of London underwriters, developed from a small seventeenth century London coffee house, ______ underwriters at that time met to do business.

A．where

B．in that

C．which

D．that

营业机构向重空库房上缴重空后，由于操作或打印机的原因未打印传票或交易流水号，如何查询交易流水号？