You need to incorporate a data access layer to meetthe requirements.
Which solution should you recommend?

A.
an Entity Data Model created by using the Entity Framework within the Web project

B.
a class that is stored in the app_code folder of the Web project, uses ADO.NET, and returns DataSets

C.
a separate data access project that includes an Entity Data Model created by using the Entity Framework
D. a separate data access project that queries the database by using ADO.NET and returns DataSets