设指针p指向双向链表的某一结点,则双向链表结构的对称性可用()式来刻画。
(A)p->prior->next == p->next->next
(B)p->prior->prior == p->next->prior
(C)p->prior->next == p->next->prior
(D)p->next->next == p->prior->prior
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(A)p->prior->next == p->next->next
(B)p->prior->prior == p->next->prior
(C)p->prior->next == p->next->prior
(D)p->next->next == p->prior->prior