How did unequal treaties after the Opium Wars weaken China's sovereignty?

Correct answer: Foreign commercial rights and port control increased

The direct answer is A: foreign commercial rights and control over ports increased. The Opium Wars exposed China to military pressure from Britain and other Western powers. Treaties such as the Treaty of Nanking imposed concessions, opened selected ports to foreign trade and gave foreigners important privileges. These arrangements limited China’s control over its territory, courts, trade and tariffs, so they are called unequal treaties. Option A is correct because expanded foreign rights and port control weakened Chinese sovereignty. Option B is wrong because China did not begin ruling Europe. Option C reverses the historical relationship; Britain did not become a Chinese province. Option D is wrong because NATO was created much later, in 1949, and was not formed in China. The Treaty of Nanking is an important exam association, but remember that several unequal treaties followed. Memory cue: Opium Wars led to foreign pressure, treaty ports and reduced sovereignty.