Which statement would best explain a copy constructor in OOP? It is a unique constructor for creating a new object as a copy of an object that already exists. There will always be only one copy constructor that can be either defined by the user or the system. It is a constructor that duplicates itself when requested on demand. It is a common constructor for preventing the creation of a new object as a copy of an object that already exists. There will always be multiple standard constructors that can be either defined by the user or the system. It is a constructor that duplicates itself on its own, based on the memory available.