You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. <br /> You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ProductList. <br /> You need to ensure that changes to ProductList are automatically reflected in the ListBox control. <br /> What should you do? ()
A、 Implement the INotifyPropertyChanged interface in the Product class.
B、 Implement the IQueryable<Product> interface in the ProductList class.
C、 Extend the DependencyObject class in the Product class.
D、 Extend the ObservableCollection<Product> class in the ProductList class.