Helen hunt jackson's a century of dishonor is a primary source from 1881 showing that americans protested the treatment of american indians in the last indian wars. jackson's work is important to understand because:

It changed the attitude of white Americans toward Native Americans.

Explanation:

Helen Hunt Jackson was born in Massachusetts, American known as a writer and poet who is famously known for her work  A Century of Dishonor in 1881 and became an activist on behalf of Native Indians treatments by the United States government. By the coming of this book, it was well-received and it affected White American attitudes toward Indians later on and also the government appointed a commission to look into Indian Ponca people.

the first forms of writing came from them in the form of pictographs around 3100 bc.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: