下列可以有效降低风险的策略为（）。I.风险分散 II.风险对冲 III.风险转移IV.风险补偿

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30068' and id < 2434599 and id<>'2434599' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30068' and id > 2434599 and id<>'2434599' order by id asc limit 5