1. In England the well-dressed gentleman of the eighteenth century protected their clothing while having their wig powdered by poking their head through a device that resembled the stocks.

(A) gentleman of the eighteenth century protected their clothing while having their wig powdered by poking their head

(B) gentleman of the eighteenth century protected his clothing while having his wig powdered by poking his head

(C) gentleman of the eighteenth century protected their clothing while having their wigs powdered by poking their heads

(D) gentlemen of the eighteenth century protected his clothing while having his wig powdered by poking his head（B）

(E) gentlemen of the eighteenth century protected their clothing while having his wig powdered by poking his head

by poking his head，这个POKING 是谁发出的动作？