You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create a Microsoft ASP.NET application.
You want to connect the application to a Microsoft SQL Server Express 2008 database named MyDatabase.
The primary database file is named MyDatabase.mdf and it is stored in the App_Data folder.
You need to define the connection string. Which connection string should you add to the Web.config file?

A.
Data Source=localhost; Initial Catalog=MyDataBase; Integrated Security=SSPI; User Instance=True

B.
Data Source=.\SQLEXPRESS; Initial Catalog=MyDataBase; Integrated Security=True; User Instance=True

C.
Data Source=.\SQLEXPRESS; AttachDbFilename=|DataDirectory|\MyDatabase.mdf; Integrated Security=True; User Instance=True

D.
Data Source=.\SQLEXPRESS; AttachDbFilename=|DataDirectory|\App_Data\MyDatabase.mdf; Integrated Security=SSPI; User Instance=True

Explanation:
CHAPTER 2 ADO.NET Connected Classes
Lesson 1: Connecting to the Data Store
Attaching to a Local SQL Database File with SQL Express (page 73)