题目：In the following use case diagram, which statement is wrong?（） 在下面的用例图中，哪个语句是错误的？（）
A. An actor doesn't represent a coherent set of roles all the time that one plays when interacting with these use cases.
B. Use case modeling is both action and data oriented.
C. A use case is initiated by an actor to invoke a certain functionality in the system.
D. A class is an abstract data type, but it doesn't support inheritance.
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