Jack is writing an essay about Europe during the Middle Ages. Read the paragraph about the rise of cities, and choose the correct phrases to complete the sentences.

After the Black Death ended, people started to move to the cities. Florence was one of the first cities to get the plague, and it was the first to recover. One of the main reasons people moved to cities was that (Cities weren't affected by famine, cities had fewer rats, or cities had more job oppourtunities). As more people moved from rural areas, the (Black death, feudal system, or merchant princes) began declining. Nobles had less power, and wealthy businesspeople gained more power.