You have an Azure subscription linked to an Azure Active Directory Premium Plan 1 tenant. You plan to implement Azure Active Directory (Azure AD) Identity Protection. You need to ensure that you can configure a user risk policy and a sign-in risk policy. What should you do first? 

Answer options:

A. Purchase Azure Active Directory Premium Plan 2 licenses for all users.
B. Register all users for Azure Multi-Factor Authentication (MFA).
C. Enable security defaults for Azure AD.
D. Upgrade Azure Security Center to the standard tier.

A

Reference: https://docs.microsoft.com/en-us/azure/active-directory/authentication/tutorial-risk-based-sspr-mfa