According to the Microsoft documentation1, to create an expiration policy for Microsoft 365 groups, you need to have one of the following roles:

Global administrator

Groups administrator

User administrator

The Groups Administrator role allows you to manage all aspects of Microsoft 365 groups, including their settings, classifications, expiration policy, and naming policy2. However, this role does not allow you to create an expiration policy for Microsoft 365 groups.

Therefore, based on this information, the correct answer is B. Request the Global Administrator role. This role has the highest level of permissions and can perform any administrative task in Microsoft 3653. Alternatively, you can request the User Administrator role, which can also create an expiration policy for Microsoft 365 groups1.