You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application allows users to post comments to a page that can be viewed by other users. You add a SqlDataSource control named SqlDS1. You write the following code segment. （Line numbers are included for reference only.） 01 private void SaveComment（） 02 { 03 string ipaddr； 04 05 SqlDS1.InsertParameters["IPAddress"].DefaultValue = ipaddr； 06 ... 07 SqlDS1.Insert（）； 08 } You need to ensure that the IP Address of each user who posts a comment is captured along with the user’s comment. Which code segment should you insert at line 04？（）
- AA
- BB
- CC
- DD