A.
All members of I are also members of II, but not all members of II are members of I.
B.
All members of II are also members of I, but not all members of I are members of II.
C.
All members of I are members of II, and all members of II are members of I.
D.
No member of I is also a member of II.
E.
Some members of I are members of II and some are not, and some members of II are members of I and some are not.