A venetian vent or rice ventilator is used in stowage of which cargo?（）.

A.device for securing a chain topping lift
B.hook to prevent the anchor cable from slipping
C.device used to drag for a submerged cable or line
D.type of clam bucket used for discharging bulk cargo

A.act as a beam to support vertical deck loads
B.lessen the longitudinal stiffness of the vessel
C.act as a tie to keep the sides of the ship in place
D.act as a web to prevent plate wrinkling due to twisting action on the vessel

A.wooden planks
B.rush mats
C.steel bars
D.wooden planks and rush mats