Question

The expansion of the rail networks led to

Answer 1

The correct answer is A:a growth in the steel industry. In order to build the railroad network, large amounts of steel were needed for the rails on the tracks. Steel was also a key component of the locomotives themselves. Thus, the expansion of this system required more steel to be produced and a growth of this industry.

Answer 2

I may be wrong, but I believe the answer is A. A growth in the steel industry. I hope this helps.