有以下结构体说明和变量定义，如图所示，指针p、 q、 r分别指向一个链表中的三个连续结点。
struct node
int data;
struct node *next;
} *p, *q, *r;

现要将q和r所指结点的先后位置交换，同时要保持链表的连续，以下错误的程序是

A．r-＞next=q; q-＞next=r-＞next; p-＞next=r;

B．q-＞next=r-＞next; p-＞next=r; r-＞next=q;

C．p-＞next=r; q-＞next=r-＞next; r-＞next=q;

D．q-＞next=r-＞next; r-＞next=q; p-＞next=r;

SALES CONTRACT

No.: QJ760125

Date: Oct. 10. 2005

The Buyer: Moon River Import ＆ Export Corporation, Busan, Korea

The Seller: JiangSu Hongjing Industrial ＆ Trade Corporation

This contract is made by and between the Seller and the Buyer, whereby the Seller agrees to sell and the Buyer agrees to buy thd under mentioned goods according to the terms and conditions stipulated below: (1)

(3) Port of Loading: LIANYUNGANG PORT, JiangSu. China

(4) Port of Destination: BUSAN PORT, Korea

(5) Shipping Mark: N/M

(6) Date of Shipment: Apr. 2006/By Vessel

(7) Terms of Payment: Letter of Credit (No.: WE570346)

(8) Documents Required: Certificate of Quality issued by CIQ indicating the No. of L/C

The Buyer The Seller

中华人民共和国出入境检验检疫

出境货物报检单

报检单位(加盖公章):江苏宏景工贸公司 编 号______

报检单位登记号:3200600018 联系人:李红 电话:66860088 报检日期:2006年04月02日

请根据所提供的单据，判断填制《出境货物报检单》150内容的正误。