The Opium War (1839) led to
A) decline of European influence in East Asia.
B) domination of China by foreign powers
C) rivalry between China and Taiwan.

The Signing of the Treaty of Nanjing in 1842

The Opium War and these treaties were emblematic of an era in which Western powers tried to gain unfettered access to Chinese products and markets for European and U.S. trade.

Western traders, including those from the United States, had long sought a variety of Chinese products (including furniture, silk and tea), but found there were few products that China wanted from the West. American trade with China began as early as 1784, relying on North American exports such as furs, sandalwood, and ginseng, but American interest in Chinese products soon outstripped the Chinese appetite for these American exports. The British had already discovered a great market in southern China for smuggled opium, and American traders soon also turned to opium to supplement their exports to China. Beyond the health problems related to opium addiction, the increasing opium trade with the Western powers meant that for the first time, China imported more goods than it exported. Settling this financial problem eventually led to the First Opium War between Great Britain and China, from 1839 to 1842. After defeating the Chinese in a series of naval conflicts, the British were in a position to make a large number of demands from the weaker Qing Government of China, in the Anglo-Chinese Treaty of Nanjing. Not to be outdone, U.S. negotiators sought to conclude a similar treaty with the Chinese, to guarantee the United States many of the favorable terms awarded the British. The Chinese readily agreed in an effort to keep all foreigners on the same footing.

U.S. President John Tyler chose Massachusetts Congressman Caleb Cushing as his representative in treaty negotiations with the Chinese. Cushing and his counterparts reached the terms of the treaty quickly and signed it at Wangxia, a suburb of the Portuguese port city of Macau, in 1844. The Treaty of Wangxia replicated many of the key terms of the Treaty of Nanjing. Most importantly, it established five treaty ports as open for Chinese-Western trade (Guangzhou, Xiamen, Fuzhou, Ningbo, and Shanghai). These treaty ports became key crossroads for Western and Chinese culture, as they were the first locations where foreigners and foreign trading operations could own land in China.

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explanation:

d. it adversely affected american productivity