The international Syrian refugee crisis that started in 2011 is best explained by which of the following migration factors? (A) an economic pull factor from the European Union, where jobs and housing are available in cities

(B) a demographic push factor from Syria, where the total fertility rate is high
(C) a political pull factor from the United States, where there is a history of Syrian immigration
(D) a political pull factor from Turkey, where there are free and open elections
(E) a political push factor from Syria, where armed conflict imperils personal safety