question: youth:civil service:serving the people
choices.label: A B C D
choices.text: contemporary history:revolutionary history:research of history going to the countryside:entering the factory:labor training entrepreneur:laborer:market struggle college students:volunteers:contribute to society
explanation: "young people" can be "civil servants"; "civil servants" can be "young people", and the main responsibilities of "civil servants" are "serving the people". "contemporary history" is mainly the history after the founding of the people's republic of china. "revolutionary history" mainly refers to a science that studies and expounds the historical laws of the occurrence, development and victory of revolutions in china since modern times."research of history" means making a study of history. they do not correspond to each other the same way as in the query. "working out" includes "going to the countryside" and "entering the factory". "labor" includes "entrepreneurs", and "market struggle" includes "entrepreneurs" and "laborers". a "college student" can be a "volunteer", a "volunteer" can be a "college student", and the responsibility of a "volunteer" is to "contribute to society".
relation: youth civil service R2.7
relation: civil service serving the people R3.10
relation: going to the countryside entering the factory R2.4
relation: entrepreneur laborer R2.2
relation: college students volunteers R2.7
relation: volunteers contribute to society R3.10