张爷爷家有一块直角三角形菜地，在这块直角三角形菜地中，较大锐角是较小锐角的2倍。你能算出这块地每个角的度数吗？

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

A. Although; but

B. Although; and

C. Although; /

D. Although; or