From the text, we may infer that the brothers publicized their business through ________.

A、from the specific to the broad
B、from the broad to the specific
C、based on different types
D、without a specific rule

A、开发人员与技术人员之间的沟通
B、开发人员与销售人员之间的沟通
C、开发人员与用户之间的沟通
D、销售人员与技术人员之间的沟通

A、精盐
B、食用碱
C、白糖
D、白醋