You are designing a Windows Presentation Foundation (WPF) application. The main window of the WPF application includes two panels: panel1 and panel2. The WPF application must meet the following requirements:
. Panel2 must be enabled only after users have entered values into multiple text boxes in panel1.
. The background color of panel2 must be set to a specific color based on one of the text box values in panel1.
. The background color of panel2 must be set at the same time the panel is enabled. You need to recommend an approach for meeting the requirements. What should you recommend?
A. MultiDataTrigger
B. DataTemplate
C. Dependency properties
D. Command
