The best description of the outcome of the Opium Wars is:
The Opium Wars not only ended the Canton System, but they forced the Qing Dynasty to enter an unequal trading relationship that was more beneficial to Europeans.
This answer accurately reflects the historical context in which the Opium Wars, particularly the First Opium War (1839-1842) and the Second Opium War (1856-1860), resulted in the Treaty of Nanking and subsequent treaties that opened up Chinese markets to foreign trade and established unfavorable conditions for the Qing Dynasty.