【单选题】In the collected body of writing we call literature, there may be distinguished two separate groupings, capable of blending, but also fitted for reciprocal repulsion. There is first the literature of ...
A.
merely compare the difference
B.
show the fact that cookbook is more useful
C.
reveal the vulgarity of some readers
D.
to point out that the power of literature is above the literature of knowledge in certain ways