Ralph is concerned that the IP address scope of available leases on his DHCP server is nearly exhausted. What happens to DHCP clients when there are no IP addresses left in the scope for assignment?

Clients are forced to share IP addresses.

Client DHCP requests are forwarded to another DHCP server.

Clients are assigned a $0\mathrm{.}0\mathrm{.}0\mathrm{.}0$ address.

Clients self$-$assign APIPA addresses.