Final answer:
The commands provided in the question don't match the standard PowerShell cmdlets used for configuring MFA, and to properly enable MFA, one would typically use the Azure portal or PowerShell modules such as 'AzureAD' or 'MSOnline'. None of the options a-d are correct. The specific process to configure MFA depends on the platform being used.
Step-by-step explanation:
The configuration of Multi-Factor Authentication (MFA) for specific users or groups typically depends on the system or platform being used. In the context of Microsoft services, such as Azure or Office 365, Multi-Factor Authentication is usually configured through the Azure portal or using PowerShell commands. However, the commands provided in the question do not match the standard PowerShell cmdlets used for configuring MFA.
In Azure, for example, you would usually go to the Azure Active Directory section, find the specific user, and then enable MFA at the user level. Group-based MFA isn't natively supported directly through MFA settings, but you can enforce MFA on a group by implementing Conditional Access policies that apply to the group.
To properly configure MFA using PowerShell for Azure, you would typically use the 'AzureAD' or 'MSOnline' module to manage user settings or Conditional Access policies. None of the commands provided in the options (a-d) are valid PowerShell cmdlets for configuring MFA. To answer the question given, we would need more context on which exact platform and command set the question is referring to, as the correct way to configure MFA can vary significantly between different systems and services.