The correct answers are C) Mao Zedong's army used guerrilla tactics to outfight Jiang's Nationalist armies and D) China´s peasant population supported Mao's effort to free them from oppressive landlords.
Mao Zedong and his Communist forces won the Chinese Civil War in that Mao Zedong's army used guerrilla tactics to outfight Jiang's Nationalist armies and China´s peasant population supported Mao´s effort to free them from oppressive landlords.
On September 21, 1949, during the Mao´s conference in Pekin to celebrate the victory of Communism over Nationalist forces, Zedong formaly announced that the new government of China would be under the rule of the Communist Party. Zedong's victory over the Nationalists ended with Jiang's government established since the 1920s.