Which of the following was NOT a key factor in the rise of the American manufacturing core in the early 20th century?
◦ its proximity to natural resources (ex. coal, iron ore)
◦ its location in an existing population center in order to draw on an existing labor supply
◦ its location in a warm climate with year-round fair weather for production
◦ its location near to the Great Lakes to allow for transport of cargo
◦ its increased connectivity to a growing network of roads and canals