Answer:
a.a revolt against the Qing Dynasty to reform China.
Step-by-step explanation:
Between 1850 to 1864, the Qing Dynasty witnessed continuous revolts and attacks from the Taiping forces led by Hong Xiuquan, a cult leader. The cause of the rebellion was the decapitated economic and social conditions of the region.
The followers of the cult grew as it attracted many peasants, workers, and miners who wanted reformation. Hong Xiuquan also established a self-proclaimed dynasty called the Taiping Tianguo(Heavenly Kingdom of Great Peace).
This rebellion led by Hong Xiuquan is said to have altered the Qing Dynasty completely. It led to rapid industrialization and urbanization and is the foundation mark of modern China.