Object-oriented analysis(OOA.is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is（）. It determines how the various results are computed by the product and presents this information in the form of a （）and associated scenarios. The second is（），which determines the classes and their attributes. Then determine the interrelationships and interaction among the classes. The last step is （ 请作答此空 ）, which determines the actions performed by or to each class or subclass and presents this information in the form of（）.

A. use-case modeling

B. class modeling

C. dynamic modeling

D. behavioral modeling