Which of the following statement(s) is/are TRUE regarding lashing requirements to secure vehicles aboard Ro-Ro vessels? （）

A. It is imperative that the securing of cargo on flats and trailers and in containers be adequate for both road and sea motions
B. The movements experienced by road borne cargo differ significantly from the roll and sway movements of a ship at sea
C. It is necessary for adequate number and strength of securing points on the vehicles themselves in order that lashings may be properly and safely utilized.
D. All the above