The correct answer to this open question is the following.
Although you did not attach options, we can say the following,
The three quotations that support the purpose of this document are the following.
1.- It was the first and formal text that including official data of the state of Minnesota.
2.- The book included facts and information about cities, landscapes, people, population, and business in the state.
3.- The text was aimed to inform and attract businessmen, investors, tourists, and even immigrants. It was such an encyclopedia to promote Minnesota. Like an almanac.
The author of this document titled "Minnesota as it is in 1870," was John W. McClung, and he not only included major cities but almost all small towns and locations to promote their activities.
