You are working on a data design for the Power Platform solution and need to present the data model to the customer visually. 
What two tools will help you to create an ERD diagram?

Answer options:

A.Dataverse Plugin Registration Tool
B.Webhook
C.XrmToolBox
D.Azure Function
E.Power BI Desktop

Correct Answers: A, C and E 
A model-driven app can use only the Dataverse as a data source. If you need to bring the data from other sources, you can use iFrame on a form and expose any website or use the canvas app as a component that you add to the model-driven app. 
iFrame helps to integrate another website content within the model-driven form. 
A canvas app does not have connectors limitations and can use any of the Power Platform connectors. If the service provides Web APIs, you can create a custom connector and use it in a canvas app. Then embed a canvas app as a component within the model-driven app. 
All other options are incorrect. 
For more information about the Power Apps customization, please visit the below URLs: 

https://docs.microsoft.com/en-us/powerapps/maker/model-driven-apps/iframe-properties-legacy
https://docs.microsoft.com/en-us/learn/modules/power-platform-architecture/4-data
https://docs.microsoft.com/en-us/powerapps/maker/model-driven-apps/embed-canvas-app-in-form
https://carinaclaesson.com/2019/12/21/using-embedded-canvas-apps-to-display-external-data-in-model-driven-apps/