Which of the following statements is $($are$)$ true?

A$.$ We can use inheritance to customize existing software.

B$.$ A superclass specifies commonality.

C$.$ A superclass can be modified without modifying subclasses

D$.$ A subclass can be modified without modifying its superclass.

Group of answer choices

All of the above.

None of the above.

A$,$ B and C$.$

A$,$ B and D$.$