单选题 Thedescriptionofthemethodshouldincludedetailsofanyprocess,suchassolventused,
timeandtemperatureofanextractionandconcentration,
aswellastheprocessusedtoreducethelevelofmicrobiolcontamination．Accordingtotheabove,whichofthefollowingisnotincluded?

• A．所使用的溶剂
• B．防止生物污染的措施
• C．提取的时间、温度
• D．操作人员的情况
• E．提取的浓度