question: energy saving:emission reduction:environmental protection
choices.label: A B C D
choices.text: gunpowder:papermaking:four great inventions get up:walk:go to work production:sales:management exercise:nutrition:health
explanation: the purpose of "energy saving" is "environmental protection", and the purpose of "emission reduction" is "environmental protection". "gunpowder" is part of the "four great inventions", and "papermaking" is part of the "four great inventions". "getting up" is a necessary step to "going to work", and the purpose of "getting up" is not "going to work". "production", "sales", and "management" are all steps that commodities need to go through from producers to consumers. the purpose of "sales" is not "management". the purpose of "exercise" is "health", and the purpose of supplementing "nutrition" is "health".
relation: energy saving environmental protection R3.9
relation: emission reduction environmental protection R3.9
relation: gunpowder four great inventions R2.3
relation: papermaking four great inventions R2.3
relation: get up go to work R5.4
relation: production sales management R2.4
relation: exercise health R3.9
relation: nutrition health R3.9