Albert Einstein,_____life had once been very hard,was given

Albert Einstein,_____life had once been very hard,was given the Nobel Prize for physics in 1921.A.of whom B.for whom C.for whose D.in whom

句意：曾经生活得非常艰辛的艾伯特 爱因斯坦,在1921年被授予了物理方面的诺贝尔奖.
答案应该选B,这个句子是主语从句,代词部分表人,应首选whom,而A和D的介词用在该句中不是很恰当,这里应该用for.