Ship grounding accidents are mostly caused by______.

A、Ship grounding accidents are mostly caused by______.
B、Ship grounding accidents are mostly caused by______.
C、Ship grounding accidents are mostly caused by______.
D、Ship grounding accidents are mostly caused by______.
E、Ship grounding accidents are mostly caused by______.
F、Ship grounding accidents are mostly caused by______.
G:Ship grounding accidents are mostly caused by______.
H:Ship grounding accidents are mostly caused by______.