You create a portal app and add a web form based on a Dataverse table. 
What are the three steps you need to accomplish to give access to the form only to the authenticated users?

Answer options:

A.Ask for Admin privileges
B.Enable table permissions
C.Create a new Web Page Access Rule
D.Create a new Entity Permission record
E.Select a Web Role

Correct Answers: B, D and E 
When you need to secure the data form or list from unauthorized access, you need to check "Enable table permissions" on the web form`s properties. 

After that, you need to link the table permissions with the portal role of the Authenticated user. 
Open the Portal management (Number 1), and under the Security section (Number 2), select the Web Roles (Number 3). Then select an Authenticated Users (Number 4) from the list of the web roles. On the next screen, click on the Related tab (Number 5). In the new menu, select the Entity Permissions (Number 6). Then on a new screen, click on the "Add Existing Entity Permissions" or create a new Entity Permission record. When you create a new record, you need to select the scope and grant access levels. After you save the record for this web role, only the users with the Authenticated Users` web role will have access to the web form. 

All other options are incorrect. 
For more information about the web roles and entity permissions, please visit the below URLs: 

https://docs.microsoft.com/en-us/powerapps/maker/portals/configure/assign-entity-permissions
https://docs.microsoft.com/en-us/powerapps/maker/portals/configure/entity-forms
https://docs.microsoft.com/en-us/powerapps/maker/portals/configure/create-web-roles