Pennsylvania's population boom during the 1800s was due largely in part to
A.) The number of slaughterhouses that opened in the northern regions.
B.) The coal industry, which began organizing in the early 1800s.
C.) Cotton that was shipped from the southern states.
D.) Factories emerging in the cities of Pennsylvania.
Pennsylvania’s population boom was largely due to the coal industry, which began organizing in the early 1800s. Pennsylvania was also a leader in the production of iron, leather, ships, lumber, textiles, and glass
