Ziva is teaching her friend about regions in the United States. Which quotes are accurate statements that Ziva should tell her friend? Check all that are true. a) “Regions are determined by the shared characteristics in an area.” b) “The United States can be divided into political and economic regions.” c) “The United States can only be divided into regions based on the location of states.” d) “There are many different ways that regions can be divided in the United States.”