Which development most contributed to the start of the second industrial revolution in the late 1800s?

A synergy between iron and steel, and railroads and coal developed .

Explanation:

It develop at the beginning of the Second Industrial Revolution. Railroads allowed cheap transportation of materials and products, which in turn led to cheap rails to build more roads. Railroads also benefited from cheap coal for their steam locomotives.

i believe the answer is:

~b. the elastic clause gives the supreme court original jurisdiction in a limited number of cases.

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social status of early civilizations was based primarily on economic power.- true ( first choice)