Question

what invention or innovation helped to make cities, factories, and railroads spring up in the north? iron steam engine cheaper steel better public education

Answer 1

The correct answer is CHEAPER STEEL

Step-by-step explanation:

Answer 2

I think the correct answer from the choices listed above is the second option. Steam engine is the invention or innovation which helped to make cities, factories, and railroads spring up in the north. A Watt steam engine is the steam engine that propelled the Industrial Revolution.