Alice is the administrator of a subnet for which she has been allotted $100$ IP addresses. She has instal a DHCP server with a scope containing all $100$ available addresses for lease. There are currently $99$ clients configured to use the DHCP server, many of which are mobile devices, and Alice fears that systems frequently leaving and rejoining the network might cause the scope of available leases to be exhausted. Which of the following adjustments can help to prevent this from happening?

Increase the lease time for the scope.

Decrease the lease time for the scope.

Install a second DHCP server,

Create a second scope for the subnet.