维生素K对下列哪种出血无效：

A．香豆素过量出血

B．纤溶亢进引起的出血

C．梗阻性黄疸引起出血

D．阿司匹林所致出血

E．新生儿出血

______ it is very late, ______ my mother is still at work. [ ]

A. Although; but

B. Although; and

C. Although; /

D. Although; or