Answer:
The correct answer is B) British merchants selling illegal opium in China
Step-by-step explanation:
The British East India Company had a very profitable export of Opium into China. However, the drug was eventually having a bad economic impact on the country as the youth were in constant problems, dying of overdose etc.
The Chinese Emperor at the time, seeing how the opium was leading to problems, banned it's import.
The British East India company quickly responded with the help the British navy as they were not ready to lose millions in profits they were making from China.
All this lead to two Opium Wars that eventually were won by the British.