What is NOT a securing system used on a containership?（）.

A.Ties a container stack to the deck
B.Ties a container to the container below it
C.Restrains racking loads
D.Restrains the container against horizontal motion

A.Stack weights should be less when using a solid bar lashing as compared to a wire lashing
B.Stack heights may be increased when using a solid bar lashing
C.Stack heights should be reduced when using a solid bar lashing
D.Solid bars should be used for lashing the first tier only，with wire lashings on the higher tier(s)

A.on the bottom tier on deck
B.in the hold
C.next to the buttress tower
D.on the top tier