‌线路设计的步骤先后顺序是‍
‌The sequence of the steps in route design is‍

A．实地调查-修改方案-实地调查
field investigation-revision plan-field investigation
B．访谈设计-实地调查-修正方案
interview design-field investigation-revision plan
C．电脑设计-实地调查-资料整理
computer design-field investigation-data collation
D．室内设计-访谈修正-实地调查
predesign-interview correction-field investigation