He was a born sailor and i can't remeber any occasion ____he had any sort of accident with the boat.
a when
b where
c at which
Dwhy
请说明为什么选这个，为什么不选其他的理由
虽说打字会累，但请各位尽量详细点
THANKS
最好还能翻译下
我认为选AHe was a born sailor and i can't remeber any occasion when he had any sort of accident with the boat. 他是一位天生的水手，并且我从来没有听说任何和他有关的船的事故的时候occasion表示时间，所以用whenwhere明显不对at which我认为介词错了，at在哪儿？why就不说了，逻辑都不对...
