The correct option is C The Manchu ruler's internal administration was oppressive and inefficient
The failure of the Manchu Dynasty to protect China from foreign aggression and to carry out extensive economic and political reforms had convinced a large number of intellectuals and members of the upper classes that the Chinese people must get rid of the “foreign yoke” of the Manchus and of the thousand-year-old absolute monarchy if they wanted to create a new, strong, modern China. The bravest supporters of a republican form of government were the revolutionaries led by the founding father of the Republic of China, Sun Yat-sen.