Children used to work in factories due to child labor. The men would be off fighting in wars and the women would work at factories or stayed at home. With children they didn't have to get paid because of their age and were treated badly. That is why they were chosen to start working in factories.
"A<span>s a refueling station for U.S. ships traveling to the Philippines" would be the best option from the list since Guam was only captured in the 20th century, which put the US into two world wars with reach into the Pacific.</span>
It's A. Brunelleschi. Hope this helps :)
The Mandate of Heaven concept helped individuals or groups of people gain power in a civilization. An individual would claim that they had received a Mandate of Heaven which granted them divine recognition to rule. By claiming their authority came from the gods, the people would accept them as their leader.
Hope this helps!!