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单项选择题

有关循证医学证据分级,证据级别从高到低正确的是()

A.Systenmaic Reviews/Meta-analyses→Randomized Controled Trials→Case control studies→Case series→Case Reports
B.Randomized Controled Trials→Systenmaic Reviews/Meta-analyses→Case control studies→Case series→Case Reports
C.Case control studies→Case series→Case Reports→Systenmaic Reviews/Meta-analyses→Randomized Controled Trials
D.Case series→Case Reports→Systenmaic Reviews/Meta-analyses→Randomized Controled Trials→Case control studies