When I graduated from high school , my family had a business ____ I never thought about getting a college education.

A．so

B．or

C．though

D．since

公路零担运输的流程为（）

A、托运受理→集中货物配载→承运

B、托运→运输公司提货→承运→收费

C、托运受理→配载装车→承运→卸车交货

D、货运代理→托收受理→验货→承运→到货通知