What sparked the development of the Second Industrial Revolution?



A. A better way of producing steam and gasoline, and new fibers for textiles



B. Petroleum, electricity, and an inexpensive way to produce steel



C. The development of a better way to produce iron cheaply



D. A new way to produce iron cheaply, new forms of money, and the steam engine

I think that the answer is B the second option, but I am not sure.