Britain continued to export opium to China despite the government's objections, leading to significant social and economic issues. The trade contributed to the Opium Wars, highlighting its importance in Britain's trading history. Therefore, the correct answer is B. opium.
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Britain continued to export opium to China despite the government's objections, leading to significant social and economic issues. This trade ultimately sparked the Opium Wars. Opium was a crucial product in Britain's trading history with China. ;