Q. Which of the following describes the Facade pattern correctly?

• (A) this pattern allows a user to add new functionality to an existing object without altering its structure
• (B) this pattern is used where we need to treat a group of objects in similar way as a single object
• (C) this pattern hides the complexities of the system and provides an interface to the client using which the client can access the system
• (D) this pattern is primarily used to reduce the number of objects created and to decrease memory footprint and increase performance