You create an application by using the Microsoft .NET Framework 3.5 and Microsoft
ADO.NET. The application uses a Microsoft SQL Server 2005 database. The application
contains a DataSet object that contains two DataTable objects. The DataTable objects
reference the Customers and Orders tables in the database. You write the following code
segment. (Line numbers are included for reference only.)
01 DataSet custOrderDS = new DataSet();
02 custOrderDS.EnforceConstraints = true;
03 ForeignKeyConstraint custOrderFK =
new ForeignKeyConstraint(“CustOrderFK”,
custOrderDS.Tables[“Customers”].Columns[“CustomerID”],
custOrderDS.Tables[“Orders”].Columns[“CustomerID”]);
04
05 custOrderDS.Tables[“Orders”].Constraints.Add(custOrderFK);
You need to ensure that an exception is thrown when you attempt to delete Customer
records that have related Order records.Which code segment should you insert at line 04?

A.
custOrderFK.DeleteRule = Rule.None;

B.
custOrderFK.DeleteRule = Rule.Cascade;

C.
custOrderFK.DeleteRule = Rule.SetNull;

D.
custOrderFK.DeleteRule = Rule.SetDefault;