Which statement about China is true, based on this map? China is the largest nation in Southeast Asia.

Myanmar was once part of China.

China shares a border with Myanmar, Laos, and Vietnam.

The southeastern border of China would be protected by a Vietnamese alliance.

C

Explanation:

Why is there a border between China Vietnam Laos and Myanmar?

China's Yunnan province, which borders Vietnam, Myanmar and Laos, has "long served as an outlet for ethnic Uyghurs and others seeking to gain asylum in the West", as well as a corridor for refugees escaping North Korea, according to an article published by The Diplomat.

Answer

C. China shares a border with Myanmar, Laos, and Vietnam.

Emperor Han Wudi was the one who declared China as a Confucian state. ... The Han Dynasty did benefit from Confucianism. Because of it, the Han Dynasty improved and established the system of ruling the land by morals and ethics, something that the Qin Dynasty has overlooked.

Explanation: Hope this helps you~!