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

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

B.
a separate data access project that includes an Entity Data Model created by using the
Entity Framework

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

D.
a separate data access project that queries the database by using ADONET and returns
DataSets