— My God! I'm nearly lost in this city.

— Yeah. The city ______ a lot. [ ]

A. changed

B. has changed

C. is changing

D. will change

消防行业协会应当加强行业自律，发挥行业服务和行业监督作用，规范（）行为，指导、督促会员单位提高产品和服务质量。