You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You want to add an audio player that plays .wav or .mp3 files when the user clicks a button. You plan to store the name of the file to a variable named SoundFilePath. You need to ensure that when a user clicks the button, the file provided by SoundFilePath plays. What should you do?（）

• A、 Write the following code segment in the button onclick event.     System.Media.    SoundPlayer player = new System.Media.    SoundPlayer(SoundFilePath); player.play();
• B、 Write the following code segment in the button onclick event.    MediaPlayer player = new MediaPlayer();     player.Open(new URI(SoundFilePath),    UriKind.Relative)); player.play();
• C、 Use the following code segment from the PlaySound()    Win32 API function and call the PlaySound function in the button onclick event.    [sysimport(dll="winmm.dll")]     public static extern long PlaySound(String SoundFilePath, long hModule, long dwFlags);
• D、 Reference the Microsoft.DirectX Dynamic Link Libraries.     Use the following code segment in the button onclick event.     Audio song = new Song(SoundFilePath);     song.CurrentPosition = song.Duration; song.Play();