Which statement about medieval cities is true? a. there were many parks and recreation areas. b. they usually had regular fire and police departments. c. they were crowded and unsanitary. d. air pollution from factory smoke was a serious problem.

most drivers errors for every 20 decisions they make while driving.

explanation:

mark brainliest!

information is crucial for making good decisions

according to my research (britannica and quizlet) the first settlements were along the huang river because it could give the crops more fertile soil that really it out. this was due to the yellow slit caused by floods of the river.