Which unused resources should you remove?

Your company has an Azure subscription that contains the following unused resources:

* 20 user accounts in Azure Active Directory (Azure AD)

* Five groups in Azure AD

* 10 public IP addresses

* 10 network interfaces

You need to reduce the Azure costs for the company.

Which unused resources should you remove?
A . the user accounts
B . the network interfaces
C . the public IP addresses
D . the groups