题目:完成在非空双向循环链表结点p之后插入s的操作是( )。
A. p->next=s ; s->prior=p; p->next->prior=s ; s->next=p->next;
B. p->next->prior=s; p->next=s; s->prior=p; s->next=p->next;
C. s->prior=p; s->next=p->next; p->next=s; p->next->prior=s ;
D. s->next=p->next; p->next->prior=s ; s->prior=p; p->next=s;
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