11）双链表的每个结点包括两个指针域。其中rlink指向结点的后继，llink指向结点的前驱。如果要在p所指结点后插入q所指的新结点，下面操作序列正确的是______。 (A)p↑.rlink↑.llink:=q; p↑.rlink:=q; q↑.llink:=p; q↑.rlink:= p↑.rlink; (B)p↑.llink↑.rlink:=q; p↑.llink:=q; q↑.rlink:=p; q↑.llink:= p↑.llink; (C)q↑.llink:= p; q↑.rlink:= p↑.rlink; p↑.rlink↑.llink:=q; p↑.rlink:=q; (D)q↑.rlink:=p; q↑.llink:= p↑.llink; p↑.llink↑.rlink:=q; p↑.llink:=q;