You are developing a product search page named Search.aspx for Web application that will be integrated into Certkiller .com's existing e-Commerce Web site. The Search.aspx page allows customers search for products that match specific criteria. Once a product is located, you want an image of the product to be displayed. You want to use an Image control to display the image. You want to configure the Image control to display a description of the image if the image cannot be displayed in the customer's Web browser. What should you do?（）

A. Set the ToolTip property of the Image control.
B. Set the ImageUrl property of the Image control.
C. Set the AlternateText property of the Image control.
D. Set the DescriptionUrl property of the Image control.