多选题 Which statement(s) are true? (Choose all that apply.)

A、 Coupling is the OO principle most closely associated with hiding a class"s implementation details.
B、 Coupling is the OO principle most closely associated with making sure classes know about other classes only through their APIs.
C、 Coupling is the OO principle most closely associated with making sure a class is designed with a single, well-focused purpose.
D、 Coupling is the OO principle most closely associated with allowing a single object to be seen as having many types.

【正确答案】 B

【答案解析】