双链表的每个节点包括两个指针域。其中rlink指向节点的后继，llink指向节点的前驱。如果要在p所指节点后插入q所指的新节点，下面哪一个操作序列是正确的

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;

机动车仪表板上（如图所示）亮，提示两侧车门未关闭。