What filename convention should be used to add a view to the MVC News widget?

The correct filename convention for adding a view to the MVC News widget involves using a specific directory structure that aligns with the resource packages in Sitefinity. When creating custom views for the MVC News widget, they must be housed within the resource package folder. This structure ensures that the views are correctly recognized and loaded by Sitefinity's MVC framework.

The use of the path \ResourcePackages[YourPackageName]\Mvc\Views\News\List.[ViewName].cshtml indicates that the view is part of a custom resource package, which helps in managing and organizing code for different environments or specific functionalities. The inclusion of List in the naming convention also suggests that the view might be intended for listing purposes, adhering to Sitefinity's expected structure for clarity and organization.

In contrast, the other options do not properly account for the required structure of resource packages in Sitefinity, which is critical for the system to correctly locate and render custom views for widgets. Therefore, option C is not only compliant with Sitefinity's conventions for MVC widget views but also enhances modularity and organization within the content management framework.