Which of the following inventions helped stimulate economic growth during the late 1800s?

Railroad Spike, 1869

Explanation

Railroads were the basis of the nation's industrial economy in the late 1800s, creating new markets, carrying billions of tons of freight to every corner of the country, and opening up the West for development.

d.summerains, the last one

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.