【单选题】

The editors of the magazine are often criticized for the ______ of their opinion column, which frequently ______ from one side of an issue to the other.
A．(A) monotony.. continues

B．(B) ingenuity.. settles
C．(C) unpredictability.. scuttles
D．(D) inconsistency .. vacillates
E．(E) rigidity.. dithers