An application has components named ComponentA, ComponentB, and ComponentC.

ComponentA and ComponentB update tables in a database named DB1.
ComponentC updates tables in a database named DB2.
At run time, ComponentA is executed with either ComponentB or ComponentC in a single transaction.
You need to compose the transaction to minimize the use of the system resources.

What should you do?

A.
Write the following code for the transaction.
[AutoComplete]
void ExecuteTransactions()
{ …}

B.
Write the following code for the transaction.
void ExecuteTransactions()
{
try
{
…
ContextUtil.SetComplete();
}
catch
{
ContextUtil.SetAbort();
}
}

C.
Write the following code for the transaction.
void ExecuteTransactions()
{
SqlConnection connection = new SqlConnection(…);
SqlTransaction trans = connection.BeginTransaction();
try
{
…
trans.Commit();
}
catch
{
trans.Rollback();
}
}

D.
Write the following code for the transaction.
void ExecuteTransactions()
{
using (TransactionScope txscope = new TransactionScope())
{
…
txscope.Complete();
}
}