How has the internet changed economic systems?

a. by reducing the need to conduct trade
b. by reducing the need for personal computers
c. by encouraging the demand for diverse media sources
d. by making many economic exchanges electronic

The Internet changed economic systems by reducing the need for personal computers.

Explanation:  

Internet has made information easily available on smartphones and other portable devices. Thus it has helped in dissemination of information while empowering individuals to make economic choices. The economy has become digitized with vast amounts of data being stored in the virtual space thereby cutting costs and improving the efficiency of the economy.

It has empowered people to become more self sufficient and less reliable for the economic benefits on others. This has reduced the need for individuals to have their personal computers and has thus changed the economic system.

c.) the country needed a stronger central government.