Northern Trail Outfitters (NTO) has a requirement to ensure all user logins include a single multi-factor authentication (MFA) prompt. Currently, users are allowed the choice to login with a username and password or via single sign-on against NTO's corporate Identity Provider, which includes built-in MFA.Which configuration will meet this requirement?
A. Create and assign a permission set to all employees that includes "MFA for User Interface Logins
B. Create a custom login flow that enforces MFA and assign it to a permission set
C. Enable "MFA for User Interface Logins" for your organization from Setup -> Identity Verification
D. For all employee profiles, set the Session Level Required at Login to High Assurance and add the corporate identity provider to the High Assurance list for the org's Session Security Levels