Your company has an existing Windows Communication Foundation (WCF) service that allows business partners to place orders. The service uses netMsmqBinding. You find that processing every order in its own transaction is causing a delay. You need to ensure that the service is configured to process multiple orders in one transaction. What should you do? （）

• A、Use service behavior and set the maxConcurrentCalls attribute.
• B、Use endpoint behavior and set the maxBatchSize attribute.
• C、Use endpoint behavior and set the maxPendingReceives attribute.
• D、Use endpoint behavior.