Background

You are developing an online shopping web application.

Business Requirements

• A user is not required to provide an email address. If a user enters an email address, it must be verified to be a valid email address.
• Information about the first product on the product page must fade out over time to encourage the user to continue browsing the catalog.
• Administrators must be able to edit information about existing customers.
• Administrators also must be able to specify a default product on the product page.

Technical Requirements

General:

• The web store application is in a load-balanced web farm. The load balancer is not configured to use server affinity.
• The web store application is an ASP.NET MVC application written in Visual Studio.

Products:

• The value of the productId property must always be greater than 0.
• The Products page for mobile devices must display to mobile users. The Products page for desktop devices must display to desktop users.

Storage:

• The data must be stored in a serialized XML data format.
• Serialized objects must be schema-independent.

Exception handling:

• Exceptions originating from IIS must display a page with support contact information.
• Some page links expire, and users who access these links encounter 404 errors.
• Exceptions must be logged by using the WriteLog method of the Utility class.

Browser and device support:

• The application must support image format conversions from .bmp to .jpeg for mobile devices.
• The application must support image format conversions from .bmp to .png for desktop devices.

Application Structure

You need to update the routes to ensure that a product is always displayed on the product page.

Which code segment should you use?

A. Option A

B. Option B

C. Option C

D. Option D