The correct option is A Opium Wars of 1832 and 1848
British traders were the primary source of the drug- Opium in China. China tried to wipe-off the illegal opium trade. In 1832, the First Opium War was fought against the British. The Second Opium War was fought in 1848 against the British and the French. China lost both the wars and had to open its ports to the Western powers, which eventually led to their economic exploitation and created resentment against foreigners.