问题

The reason ______ the essay(作文) of the Anhui edition of the 2012 National College Entrance Exam is voted the worst is _______ it makes test-takers at a total loss
A:why; because
B:that; that
C:that; because
D:why; that
B:that; that
C:that; because
D:why; that
正确答案是: