You are creating a Windows Forms application by using the .NET Framework 3.5.
The application is used by a financial service provider. You discover that the service provider transfers large amounts of data by using XML.
You need to read and validate the XML documents in the most time-efficient manner.
Which technology should you use?

A.
The XmlReader class

B.
The XmlDocument class

C.
The XmlResolver class

D.
The LINQ to XML method