You are creating a Windows Presentation Foundation application by using Microsoft .NET Framework 3.5.
You plan to use the application to preview video files. You write the following XAML code fragment.

01 <Window x:Class="myClass" xmlns= "http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="myWindow" Height="300" Width="300">
02 <StackPanel Background="Black">
03
04 <StackPanel HorizontalAlignment="Center" Orientation="Horizontal">
05 <Button Name="btnPlay" Margin="10" Content="Play" />
06 </StackPanel>
07
08 </StackPanel>
09 </Window>

You need to ensure that the application plays only the first 10 seconds of a video that you want to preview.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A.
Insert the following XAML fragment at line 03.
<MediaElement Name="myMediaElement" Stretch="Fill" />

B.
Insert the following XAML fragment at line 03.
<MediaElement Name="myMediaElement" Source="MediaFileSelected.wmv" Stretch="Fill" />

C.
Create the following method in the code-behind file.
public void PlayMedia(object sender, RoutedEventArgs args)
{
myMediaElement.Play();
}

D.
Insert the following XAML fragment at line 07.
<StackPanel.Triggers>
<EventTrigger RoutedEvent="Button.Click" SourceName="btnPlay">
<EventTrigger.Actions>
<BeginStoryboard Name= "myBegin">
<Storyboard SlipBehavior="Slip">
<MediaTimeline Source="MediaFileSelected.wmv" Storyboard.TargetName="myMediaElement" BeginTime="0:0:0" Duration="0:0:10" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</StackPanel.Triggers>

E.
Insert the following XAML fragment at line 07.
<StackPanel.Triggers>
<EventTrigger RoutedEvent="Button.Click" SourceName="btnPlay">
<EventTrigger.Actions>
<BeginStoryboard Name= "myBegin">
<Storyboard SlipBehavior="Slip">
<MediaTimeline Storyboard.TargetName="myMediaElement" BeginTime="0:0:0" Duration="0:0:10" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</StackPanel.Triggers>