To identify users eligible for the Cloud Application Administrator role using Azure AD Privileged Identity Management (PIM), you should use the "Azure AD roles" blade in the Privileged Identity Management settings (option D).
Here's how you can do it:
Go to the Azure portal (https://portal.azure.com).
In the left-hand navigation pane, navigate to "Azure Active Directory."
Under the "Security" section, select "Privileged Identity Management."
On the Privileged Identity Management dashboard, select "Azure AD roles."
In the list of roles, locate and select the "Cloud Application Administrator" role.
In the "Eligible" tab, you can view the list of users who are eligible for the Cloud Application Administrator role.