The correct response is:
The Qing dynasty faced rebellions and wars after the Treaty of Nanking. This led to its collapse.
Analysis: The Treaty of Nanking in 1842 marked the beginning of a series of conflicts and turmoil for the Qing Dynasty, including the Taiping Rebellion (1850-1864) and the Second Opium War (1856-1860). These events were indicative of widespread discontent and challenges posed by both internal strife and external pressures from imperialist powers. Ultimately, this period of turmoil culminated in the Xinhai Revolution in 1911, leading to the collapse of the Qing Dynasty and the establishment of the Republic of China in 1912.