Answer:
Option: a. new technologies were invented
b. many people moved to the cities
c. there were fewer farmers
Step-by-step explanation:
The United States changed during the late 1800s because of several reasons. America at the late 1800s began to see the Industrial Revolution, which came to be known as the Second Industrial Revolution. New technologies invented for industries. Telephone, Incandescent Lamp and others were some of the technology developed. With people moving from rural areas to the urban led to the decline in farms.