You are integrating a Windows Communication Foundation (WCF) service within an enterprise-wide Service Oriented Architecture (SOA) Your service has the following service contract.
You need to allow the code in the ConfirmCreditCard method to participate automatically in existing transactions. If there is no existing transaction, a new transaction must be created automatically. What should you do?
A. Inside the ConfirmCreditCard method, surround the code that must participate in the transaction with a using(new TransactionScope()) block
B. Inside the ConfirmCreditCard method, surround the code that must participate in the transaction with a using(new CommittableTransaction()) block.
C. Add an [OperationBehavior(TransactionScopeRequired=true)] attribute to the ConfirmCreditCard method.
D. Add an [OperationBehavior(TransactionAutoComplete=true)] attribute to the ConfirmCreditCard method.
