Because they were thinly setteled and the Mexican government had long neglected them. List 3 details of the Treaty of Guadalupe Hidalgo.
You could argue that this is an indication of Walter Cunningham's severe poverty. He is very poor, and poor people did not have access to sweets or treats such as molasses syrup, so when he was offered it he deemed it appropriate to drench his entire lunch in it.
Chapter 9. France
I found the answer under the “Recommended things to see” section. Since Paris is in France, and tourist attractions would be things to see, Chapter 9 France is the correct choice.