题目内容:
Accordingtocritics,itishardtoregulatethetradeinwildanimalsinBrazilbecause
A.BrazilhasnotsignedCITES. B.BrazilhasfailedtoenforceCITES.
C.regulationsonthetradearetooloose.
D.thetradeinwildanimalshasgoneunderground.
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答案解析: