题目内容:
Whyhasprotectionismalwaysbeenexercisedevenifitiswastefulandunjust?Because__________ A.ithelpstoestablishnationalindustryofone'sown
B.itcanachieveanindependenteconomy
C.itisfavoredbygeneralpublic
D.itbenefitssomeprivilegedfew
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答案解析: