The correct answer is Modify the user's Directory role setting on the Directory role blade.

This is correct because the User Administrator is an Azure Active Directory administrative role and Azure AD roles are assigned on the user's Directory role settings in the Azure Active Directory user profile rather than at the subscription level.

To grant the role you open the Azure portal, go to Azure Active Directory, open Users, select the SupportAdmin2 account, choose the Directory role option on that user's page and then add the User Administrator role to the account.

Assign a role to the account in the Subscription access control IAM pane is incorrect because the IAM pane manages Azure RBAC for subscriptions and resources and it does not assign Azure Active Directory administrative roles.

Place the account into an administrative group from the Groups pane is not the right action in this context because the question asks you to change the individual user's administrative role setting and group membership alone does not modify the user's Directory role there. Group based role assignments are a separate configuration and are not the action described by the user account Directory role blade.

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