You need to integrate the Dataverse and Azure Service bus and develop a listener that can return a string value back to the Dataverse. 
Please select the types of listeners you can implement to achieve your goal.

Answer options:

A.Queue
B.REST
C.One-way
D.Topic
E.Two-way

Correct Answers: B and E 
Microsoft Dataverse integrates with several Azure services like Azure Service Bus, Azure Event Hubs, Azure Logic Apps, and others. The integration depends on detecting the Dataverse’s events. The Event Framework provides this information to the declarative tools and registered extensions.
The Dataverse supports several methods of consuming the Azure Service Bus messages. Five types of listeners can be used for integration with the Dataverse: Queue — this method is for non-critical messages. It does not require a listener for message access. You can read the messages in “destructive” (removing from the queue after “reading”) or “non-destructive” (leaving in a queue after “reading”).
Topic — this method is similar to the Queue, but it requires at least one subscribed listener for the topic. It is a helpful method if you have multiple message consumers.
One-way — this method requires at least one active subscriber for Service Bus messages. Without any subscribers, the message post will fail.
Two-way — this method is similar to the One-way listener. Except it can provide a return message back to the Dataverse.You need to register your Dataverse plug-in to post the message. After that, you can receive back string value from the listener.
REST — this method is similar to the Two-way listener, but it works with a REST endpoint.
Options B and E are correct because the Two-way and REST listeners can return the string value back to the Dataverse.
All other options are incorrect. 
For more information about the Service Bus event listeners, please visit the below URLs: 

https://docs.microsoft.com/en-us/powerapps/developer/data-platform/write-listener-application-azure-solution
https://docs.microsoft.com/en-us/learn/modules/integrate-common-data-service-azure-solutions/2-azure-service-bus
https://docs.microsoft.com/en-us/learn/modules/integrate-common-data-service-azure-solutions/3-event-listener
https://docs.microsoft.com/en-us/dynamics365/customerengagement/on-premises/developer/walkthrough-register-azure-aware-plug-in-using-plug-in-registration-tool