The correct option 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.
The Opium Wars (1839-1842 and 1856-1860) led to a series of treaties that favored Western powers, opening up trade ports to foreign merchants and allowing them greater control over trade in China, culminating in significant loss of sovereignty for the Qing Dynasty.