Concept:Philip left Jerusalem because persecution forced believers to scatter into different regions.Explanation:After Stephen was stoned, Saul began to persecute the church severely in Jerusalem.This persecution caused the believers, including Philip, to flee from Jerusalem and be scattered.Philip went to Samaria and preached Christ there because of this forced scattering.So his journey to Samaria was directly caused by the persecution raised by Saul.Answer:C. persecution of Christians by Saul