Which of the following did the railroad do?
transport goods
provide personal transportation
increase communication
all of the above

All of the above.

Explanation:

The railroad was responsible for connecting major cities in the United States through these avenues.

all of the above brother

Explanation:

cuz i said sooo

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity

just finished this it is b. centrifugal force