在一个双链表中,在 *p 结点之后插入结点 *s 的操作是。 A. s -> prior = p; p -> next = s; p -> next -> prior = s; s -> next = p -> next; B. s -> next = p -> next; p -> next -> prior = s;  p -> next = s; s -> prior = p; C. p -> next = s; s -> prior = p; s -> next = p -> next; p -> next -> prior = s; D. p -> next -> prior = s; s -> next = p -> next; s -> prior = p; p -> next = s;