Which of the following is/are TRUE regarding lashing requirements to secure vehicles aboard Ro-Ro vessels? （）
- AThe securing of cargo on flats and trailers and in containers must be adequate to withstand both road and sea motions
- BThe generally recommended lash angle cannot be greater than 45 degrees relative to the deck inany direction
- CIt is necessary for an adequate number of securing points on the vehicles themselves in order that lashings may be properly and safely utilized
- DAll the above