When was the light bulb discovered

1879

Explanation:

First in 1879 and then a year later in 1880 -- and began commercializing incandescent light bulb

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.

answer; (c) slaves brought to the americans from africa;