在循环双链表的p结点之后插入s结点的操作是______。
A. p->next=s; p->next->prior=s; s->prior=p; s->next=p->next;
B. s->next=p; s->next=p->next; p->next=s; p->next->prior=s;
C. p->next=s; 3->prior=p; p->next->prior=s; s->next=p->next;
D. s->prior=p; s->next=p->next; p->next->prior=s; p->next=s;