D. The Hessians were German mercenaries, or soldiers that fight for money, hired by the British. The British hired them to fight during the American Revolution.
Geographic location provided trade and protection.
Improvements and construction of roads and canals.
Mexico. people from mexico were looking for jobs and lot of people were ticked off that they were trying to "steal the jobs"
During the World War II, many Americans helped in the productions of arms. Many women during this time were empowered to work in factories. The government had encouraged its citizens to save and recycle their scraps metals for arms production.