The correct response is: The Qing dynasty faced rebellions and wars after the Treaty of Nanking. This led to its collapse.
After the Treaty of Nanking was signed in 1842, the Qing Dynasty experienced a series of conflicts and internal disruptions, such as the Taiping Rebellion, the Second Opium War, and the Boxer Rebellion. These events weakened the Qing government, eroded its authority, and diminished popular support, ultimately contributing to its collapse with the Xinhai Revolution in 1911.