If You Are Designing a Class for an ADT, You

Multiple Choice

If you are designing a class for an ADT, you can tell if the class is an ADT if

A) when you change the implementation of the class, none of the rest of the program needs to change.
B) when you change the interface of the class, nothing else needs to change.
C) you change the privte part and the rest of the program using the ADT does not compile.
D) everything must be changed.