Which king conquered and united several smaller kingdoms to form mali

Which of the following is an effect that constantine's conversion to christianity had on the roman empire?

1. america's first national road morse 2. joined lake erie with the hudson river cooper 3. steam-driven locomotive erie canal 4. allowed businesspeople to keep in touch with trends cumberland 5. telegraph code fulton 6. clermont telegraph

Which sentence best compares the employment opportunities between farms and cities in the late 1800s