The New Deal relied on A. The private sector to pull America out of the Great Depression
B. Creating only a public sector in the economy
C.Creating a strong public sector in the economy to serve as an engine to help pull the country out of the Great Depression
D. War only to pull us out of the Great Depression

It's either B or C.

Once steel became cheaper and easy to mass-produce, stronger rails for railroads were able to be built. The United States, among other countries, could lay railways like never before. Steel rails lasted ten-time longer than steel rails and could support longer trains with heavier loads

i hope this helps<3 :)