Which development most contributed to the start of the second industrial revolution in the late 1800s?
a; the development of new agricultural schools
b; the collapse of the railroad industry
c; the availability of inexpensive steel
d; the invention of water powered machines

c; the availability of inexpensive steel

Explanation:

The Second Industrial Revolution started in the middle of the 19th century. During that moment, electricity and electric light were introduced into mechanization and this made the steel production rise.

Mass production was developed, the scale and speed of production of steel increased, this pushed the railroad development, the production of machine tools, the construction of buildings and automobiles.

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.

b: the establishment clause  

b: socialism