20世纪30年代埃塞俄比亚人民的抗意民族解放斗争和西班牙人民的反法西斯民族革命战争失败的共同原因是 [ ]

A、英、法、美的纵容侵略政策

B、一味坚持阵地战，伤亡惨重

C、反动势力发动叛乱并组成叛乱政府

D、内外敌人的夹攻，首都陷落

His success ____ the fact ____ he had been working hard.

A．put in; which

B．led to; because

C．lay in; that

D．got in; that