He went to bed _______, when he woke up he found he still had his shoes on.

A．drinking

B．being drunk

C．drunk

D．having drunk

魏明与桂敏到婚姻登记机关申请登记结婚，婚姻登记机关依法予以登记并发给结婚证。产生魏明与桂敏法律上的婚姻关系的事实在法学上被称做什么( )

A．法律事件

B．法律事实

C．事实行为

D．事实关系