One major outcomeof the Secong Opium war is option D. China was forced to allow Europeans to sell opium in China.
The Second Opium War was a war pitting the United Kingdom and the French Empire against the Qing dynasty of China, lasting from 1856 to 1860.
The term "Second Opium War" refers to one of the British strategic objectives: legalizing the opium trade, expanding trade, opening all of China to British merchants, and exempting foreign imports from internal transit duties.