Judging from both the chart and the photo, how can you use this document to argue that building the Great Wall was not worth the cost?

It led to death of soldier and peasants

Explanation:

The Great wall of China is not worth the cost because  

a)It led to the death of soldiers and several other deaths

b)The builders suffered extreme climatic condition

c)Soldiers and peasants of Qin and Han dynasty went through hardship to protect it  

i believe that the answer to the question provided above is that  establishing smaller ethnic communities within larger communities  gives more chance for people to know each other more but this might lead to the  conflict between groups.