How did British manufacturing drive its diplomatic and trade relations with India? a. India's massive demand for European manufactured goods quickly created a trade surplus for Britain b. The British East India Company dominated India for its cotton and other products, such as rice and opium, which it hoped to trade with China for tea, silk, and porcelain c. Because India was one of the largest producers of manufactured goods, several European powers sent envoys to learn about India's processes and set up trade relations with India