Which extinguishing agent will cool down a heated bulkhead in the least amount of time?（）

A.facial respirator mask
B.ear plugs
C.rubberized boots
D.fireman's outfit

A.a sponge used to mop up and store condensation must be kept salt free
B.only condensation on the bottom of the canopy should be collected
C.it should be strained through a finely woven cloth
D.chlorine tablets should be used to make it drinkable