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？（）

A.A
B.B
C.C
D.D