You are designing an ASP.NET Web application. You have the following requirements:
Relational database tables must automatically map to to .NET classes. The data access
layer must be able to target database engines other than Microsoft SQL Server. You need
to recommend a data access technology. Which technology should you recommend?

A.
Entity Framework 4

B.
LINQ to SQL

C.
direct ADO.NET calls

D.
.NET Framework Data Provider for OLE DB