in what way did thomas edison have the greatest effect on the nation?
a. indoor activity became possible after dark.
b. automobiles could be built more efficiently and cheaply.
c. electrical devices transformed homes and businesses.
d. most jobs in the nation involved technological innovation.
c. electrical devices transformed homes and businesses.
Thomas Edison had the greatest effect on the nation by inventing and popularizing electrical devices such as the light bulb and the phonograph, which transformed the way people lived and worked. His innovations in electricity and lighting revolutionized homes and businesses, making them more efficient and convenient.