You are creating a Windows Forms application by using the .NET Framework 3.5. You write the following code segment to update multiple databases on a SQL Server 2008 database. (Line numbers are included for reference only.)

01 string connectionStringCustomer = @”DataSource=CUSTOMER;Integrated Security= SSPI;”;
02 string connectionStringOrders = @”Data Source=ORDER;Integrated Security= SSPI;”;
03 SqlCommand cmdCustomer = new SqlCommand();
04 SqlCommand cmdOrders = new SqlCommand();
05 SqlConnection cnnCustomer =new SqlConnection(connectionStringCustomer);
06 SqlConnection cnnOrders =new SqlConnection(connectionStringOrders);
07

You need to ensure that all database updates are included in a single distributed transaction.Which code fragment should you add on Line 07?

A.
cnnCustomer.Open();cnnOrders.Open();
…cmdOrders.ExecuteNonQuery();
…cmdCustomer.ExecuteNonQuery();
cnnOrders.Close();
cnnCustomer.Close();

B.
TransactionScope scope = new TransactionScope();
cnnCustomer.Open();
cnnOrders.Open();
…cmdOrders.ExecuteNonQuery();
…cmdCustomer.ExecuteNonQuery();
cnnOrders.Close();
cnnCustomer.Close();
scope.Complete();

C.
TransactionScope customerScope = new TransactionScope()
{
using (SqlConnection cnnCustomer = new SqlConnection (connectionStringCustomer)) { }
customerScope.Complete();
}
using (TransactionScope ordersScope = new TransactionScope())
{
using (SqlConnection cnnOrders = new SqlConnection(connectionStringOrders)) { }
ordersScope.Complete();
}

D.
try {
cmdOrders.Transaction =
cnnOrders.BeginTransaction(); … cmdOrders.ExecuteNonQuery(); …
cmdCustomer.Transaction = cnnCustomer.BeginTransaction(); …
cmdCustomer.ExecuteNonQuery(); cmdCustomer.Transaction.Commit();
cmdOrders.Transaction.Commit();}catch {
cmdCustomer.Transaction.Rollback(); cmdOrders.Transaction.Rollback();}