Policemen sometimes appear at the most unexpected places. A group of "policemen" in Taizhou, Zhejiang province, is not an exception. A total of 17 mannequins modeled to look like police officers are on duty and set up on the south part of No 74 Provincial Road. The police department said the mannequins serve as a warning for passing drivers to obey traffic rules.

How many mannequins are on duty?

A. 17

B. 18

C. 19

（中國日報網英語點津 Helen 編輯）