题目：在双向循环链表中，在p所指的结点之后插入s指针所指的结点，其操作是____。
A. p->next=s; s->prior=p; p->next->prior=s; s->next=p->next;
B. s->prior=p; s->next=p->next; p->next=s; p->next->prior=s;
C. p->next=s; p->next->prior=s; s->prior=p; s->next=p->next;
D. s->prior=p; s->next=p->next; p->next->prior=s; p->next=s;
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