单选题An instance member（）Ais also called a static memberBis always a variableCis never a methodDbelongs to a single instance， not to the class as a wholeEalways represents an operation
单选题
An instance member（）
A
is also called a static member
B
is always a variable
C
is never a method
D
belongs to a single instance， not to the class as a whole
E
always represents an operation
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