在非空双向链表中，若要在指针p所指结点的后方插入指针s所指的新结点，下列操作序列正确的是？

be082924 单选题共个子题

假设双向链表的结点结构包含prior（指向前驱结点）和next（指向后继结点）两个指针域。

p->next = s; s->prior = p; s->next = p->next; p->next->prior = s;

s->next = p->next; p->next->prior = s; p->next = s; s->prior = p;

s->prior = p; s->next = p->next; if(p->next != NULL) p->next->prior = s; p->next = s;

s->prior = p; p->next = s; s->next = p->next; if(p->next != NULL) p->next->prior = s;

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