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　　Regarding historical and prospective scenario analysis，which of the following is not wrong?
　　A.     Historical scenario analysis only considers recent history.
　　B.     Prospective scenario analysis provides a long-term perspective.
　　C.     The time period and frequency of observations is critical to prospective analysis.
　　D.     The long history of data does not provide adequate observations to *uate stress situations.
　　Answer: D
　　The drawback to historical scenario analysis is the lack of available events to model portfolio values in stress situations.