What should you do?

You have a DHCP server named Server1.
Server1 has an IPv4 scope that serves 75 client computers that run Windows 10.
When you review the address leases in the DHCP console, you discover several leases for devices that you do not recognize. You need to ensure that only the 75 Windows 10 computers can obtain a lease from the scope.
What should you do?
A. Run the Add-DhcpServer4ExclusionRange cmdlet.
B. Create and enable a DHCP filter.
C. Create a DHCP policy for the scope.
D. Run the Add-DhcpServer4OptionDefinition cmdlet.