Question

What sparked the development of the second revolution

A the development of a better way to produce iron cheaply

B a better way of producing steam and gasoline,and new fibers for textiles

C petroleum,electricity,and an inexpensive way to produce steel

Answer 1

For the answer to the question above, the Second Industrial Revolution witnessed the expansion of electricity, petroleum, and steel. So believe the answer is C petroleum,electricity,and an inexpensive way to produce steel.
I hope my answer helped you. Have a nice day!