消防应急照明和疏散指示系统日常管理过程中应保持系统连续正常运行，下列()需要每个月进行一次维护管理()。
A.检查消防应急灯具
B.检查消防应急灯具的指示状态
C.应急照明集中电源和应急照明控制器的状态
D.应急照明集中电源和应急照明控制器的指示状态
E.检查应急工作时间

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