<img src="https://nimg.ppkao.com/2018-07/yiyu/2018072716035526511.jpg?sign=ff041651f8b8b8c9d9dfc590ec53ed28&t=62d4ac45" /><br /> When the application si run, it appears as follows<br /> <img src="https://nimg.ppkao.com/2018-07/yiyu/2018072716034380298.jpg?sign=bba244b51114fef50cca6197408add70&t=62d4ac45" /><br /> You need to ensure that the TextBlock control with the contents "Product shipped" is horizontal centered to the grid?<br /> Which mark up segment should you add to the TextBlock control?()
A、 GridView.Columncollection="1,2"
B、 Grid.Columnspan="2"
C、 Manipulation.ManipulationCharacter="2"
D、 TextBlock.TextAllignment ="Center"