Which of the following is correct about Structural design patterns.

• A. these design patterns are specifically concerned with communication between objects.
• B. these design patterns concern class and object composition. concept of inheritance is used to compose interfaces and define ways to compose objects to obtain new functionalities.
• C. these design patterns provide a way to create objects while hiding the creation logic, rather than instantiating objects directly using new opreator.
• D. none of the above.