See the solution in the explanation below:
Explanation
To deploy the Microsoft Viva Connections app to Teams and install the app as the first item on the app bar of the Teams client for all users, you need to use the Teams admin center and PowerShell. Here are the steps to follow:
Sign in to the Teams admin center with your Microsoft 365 username and password1.
In the left navigation, go to Teams apps > Manage apps.
Click Upload and then select the Viva Connections app package that you created using PowerShell2. If you have not created the app package yet, you can follow the instructions in this article to do so.
After uploading the app package, click on the app name and then click Publish.
In the left navigation, go to Teams apps > Setup policies.
Select an existing policy or create a new one by clicking Add.
In the Setup policy pane, under Installed apps, click Add apps and then select the Viva Connections app from the list.
Drag and drop the Viva Connections app to reorder it as the first item on the app bar.
Click Save and then Close.
To assign the setup policy to all users, you can use PowerShell to run the following cmdlet:
Get-CsOnlineUser | Grant-CsTeamsAppSetupPolicy -PolicyName "YourPolicyName" Replace "YourPolicyName" with the name of the policy that you created or modified in step 6.
Note: It may take up to 24 hours for the changes to take effect.
Now, you have deployed and installed the Microsoft Viva Connections app to Teams as the first item on the app bar for all users.

Explanation
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.

Reference:
https://docs.microsoft.com/en-us/microsoftteams/turning-on-and-using-call-quality-dashboard

Reference:
https://docs.microsoft.com/en-us/microsoftteams/manage-resource-accounts

Explanation

Reference:
https://docs.microsoft.com/en-us/microsoftteams/coexistence-chat-calls-presence