Generally speaking, it was the "indentured servants" who were considered members of the lower class in colonial society, although shoemakers could be as well, depending on their role in the process.
Answer:
"The lure of new, high-paying, high-skill manufacturing jobs"
Explanation:
Towards the end of the 1800s, the United States of American economy moved or transitioned away from agriculture to an industrial economy.
It's evident through many railroad construction and the western territory expansion which led to more jobs, business, and manufacturing of goods.
A is your answer. Have a good day!