Your company has a Microsoft Entra tenant that contains the following users: User$1$ uses multi$-$factor authentication $($MFA$)$ User$2$ is registered for MFA but never used MFA User$3$ is enabled for MFA but is not registered for MFA User$4$ is disabled for MFA When the users sign in$,$ Microsoft Entra ID Protection detects a risk and requires MFA. Which users can sign in$?$ Select only one answer. User$1$ and User$2$ only User$1$ only User$1,$ User$2,$ and User$3$ only User$1,$ User$2,$ User$3,$ and User$4$