23.双向链表的局部结构如下图所示,若要删除指针t所指结点,则命令序列是(A)。A.p-> rnext=q;q- >lnext=p;free(t);в. p->lnext=q;q- > rnext=р; free(t);C. t->rnext->lnext=q;t->lnext->rnext=p;free(t);D. t-> lnext>rnextp;t->rnext->lnext-q;free(t);