22. Let set $R$ consist of nine different integers, six of which are $2,3,4,6,9, 14$. Then the number of possible medians of the elements in set $R$ is ( ).
(A) 4
(B) 5
(C) 6
(D) 7
(E) 8
22. C

From the given information, we know that the median of the nine numbers can only be selected from the seven numbers 3～9.