How did john spargo get the information for his book the bitter cry of children?
he went to different countries to reveal uneducated children.
he went to different cities to reveal homeless children.
he went undercover to the mines to view the condition of working children.
he went undercover to the railroads to see women and children working.
he went to reveal the hard cotton picking labor of children.

He went undercover to the mines to view the condition of working children.

Explanation:

Before the war, Texas was sparsely populated; there were more people living in New York City at the time than in the entire state of Texas. Most Texans lived on farms or ranches or in small towns, and only about 40 percent had a high school education.The military's presence in Texas grew exponentially during World War II. There were 142 major military installations across the state, and more than 750,000 Texans served in uniform during the war. ... Thirty-three Texans earned the Medal of Honor, including Audie Murphy, the army's most decorated soldier, and Cmdr.The military's presence in Texas grew exponentially during World War II. There were 142 major military installations across the state, and more Thirty-three Texans won the Medal of Honor—twenty-five in the army or air force and eight in the navy or marines.