In determining a safe speed ______ shall not be among those take

In determining a safe speed ______ shall not be among those taken into account．

A.the characteristics，efficiency and limitation of the radar equipment

B.any constraints imposed by the radar range scale in use

C.the effect on radar detection of the sea state，weather and other sources of interference

D.the safe working load of the cranes both on board and ashore

正确答案是D