In the Venn Diagrams of Two Contradictory Propositions

In the Venn diagrams of two contradictory propositions:

A) if one was marked by shading, the other will also be marked by shading
B) if one was marked with an X, the other will be marked by an X
C) if an area is marked in one diagram, it will be unmarked in the other
D) one will have a marking in the S circle, and the other will have a marking in the P circle
E) one will shade an area of the diagram, and the other will have an X in the same area of the diagram