Which of the Following Is True with Regard to the Republican

Which of the following is true with regard to the Republican era in China?

A) While many credit Sun Yat-sen with the founding of the Republic of China in 1911, China at the time was hardly a coherent political entity.
B) Despite the military offensives launched in the 1920s, Chiang Kai-shek failed to bring most of China under GMD rule.
C) The Revolutionary Alliance, led by Mao Zedong, had the backing of a strong armed force.
D) By the first decade of the twentieth century, the activities of the Revolutionary Alliance steadily dwindled in China's major urban centers.