The correct option is C It was a single event that lasted till October, 1935.
Mao Tse-Tung who spearheaded the people against oppression in China. Mao Tse-Tung organised the Long March in October, 1934. It was a move of retreat from the attacks by the Kuomintang Party to protect the communists. The Long March was a series of such retreats by the revolutionaries and members of the Communist Party of China. It was not a single event. It extended till October, 1935. The Long March headed to the northern parts of China where the marchers were welcomed by the rural native people.