How could serfs move up from the bottom of the social hierarchy? They could prove themselves in battle.
They had to serve as a serf for a certain number of years.
They had to be freed by their lord.
They could marry into a higher level of the hierarchy.

C. is the answer

List a few examples of city-states that practiced oligarchy in ancient greece

What is the main purpose of "falling action" in a story?

Which of these was one of the most important aspects of washington's presidency a. he did not consider how his actions would affect later presidents b. he came to believe that political parties would be good for the country. c. he insisted that congress make specific rules about the duties of the president d. he did not take advantage of the opportunity to keep the power the country offered him.