I think the correct answer is b
Syempre naman. Pag meron kaylangan nang tulong at ikaw ay nag tutur, try mo naman tulungan sila.
This event was known as the Long March and it lasted from October 1934 till October 1935, during which time Mao's Army was evading Kuomintang. The Long March consolidated Mao's position as the leader.
I think your answer should be B) Cotton, indigo and tobacco.
Glad I could help, and good luck!