You are designing a Windows Presentation Foundation (WPF) application. You have the
following requirements: • Run client-side validation tests on a large result set from a
Microsoft SQL Server 2008 database. • Validate each row of data without storing the entire
result set in memory. You need to recommend a data access technology. What should you
recommend?

A.
LINQ to Entities using the ElementAt() method

B.
ADO.NET using SqIDataAdapter objects and DataSet objects

C.
LINQ to SQL using the ElementAt() method

D.
ADO.NET using SqlDataReader objects