问题：

[多选] Which statements concerning the correlation between the inner and outer instances of non-static inner classes are true？（）  

A . Member variables of the outer instance are always accessible to inner instances， regardless of their  accessibility modifiers.
B . Member variables of the outer instance can never be referred to using only the variable name within  the inner instance.
C . More than one inner instance can be associated with the same outer instance.
D . All variables from the outer instance that should be accessible in the inner instance must be declared  final.
E . A class that is declared final cannot have any inner classes.