The territory of Wu Yueguo (907-978) included thirteen states and an army. Where does this "one army" refer to?

The names of the counties in the thirteen states of wuyue's domestic army are as follows:

First Army: Anguo Yijin Army. Today's Lin 'an is the birthplace of Qian Liu, so it was promoted to Yi Jin Army.

Thirteen countries:

Hangzhou (the capital): governs Qiantang, Qianjiang, Yan Guan, Yuhang, Fuchun, Tonglu, Yuqian, Deng Xin, Hengshan and Wu Kang.

Yuezhou (Dongfu): governs Huiji, Yin Shan, Zhuji, Yuyao, Xiaoshan, Shangyu, Xinchang and Zhanba counties.

Huzhou: It governs Wucheng, Deqing, Anji and Changxing.

Wenzhou: governs Yongjia, Ruian, Pingyang and Yueqing counties.

Taizhou: governs five counties: Linhai, Huangyan, Taixing, Yong 'an and Ninghai.

Mingzhou: governs six counties: Yin, Fenghua, Cixi, Xiangshan, Wanghai and Wengshan.

Special area: governs Lishui, Longquan, Suichang, Jinyun, Qingtian and Bailong counties.

Quzhou: governs Xi 'an, Jiangshan, Longyou and Changshan counties.

Wuzhou: governs Jinhua, Dongyang, Yiwu, Lanxi, Yongkang, Wuyi and Pujiang.

Zhou Mu: governs five counties: Jiande, Shou Chang, Sui 'an, Fenshui and Qingxi.

Xiuzhou: governs Jiaxing, Haiyan, Huating and Chongde.

Suzhou: governs five counties: Wu, Jinzhou, Kunshan, Changshu and Wujiang.

Fuzhou: governs Fujian, Houguan, Changle, Lianjiang, Changxi, Fuqing, Gutian, Yongtai, Minqing, Yongzheng and Ningde1/counties.

In 2004, the national qualification examination for tour guides in Zhejiang Province was Basic Knowledge of Tour Guides 16. Wu Yueguo (907-978) has thirteen states and one army, and "one army" means (D);

A. Hangzhou;

B. Suzhou;

C. Fuzhou;

D. Lin 'an;