What was one reason thag china lost the sino japanese war? ?

The main and first reason is corruption. 

China lost the Sino-Japanese war as a cause of corruption weakening the unity of the nation and also china at the time was not very industrialized and lacked the industry to compete with japan also the military was very under armed and trained and china was also undergoing a communist civil war from the north for Mao Zedong 

The correct answer is b

Transcontinental railroad was the most effective way to travel.