When encountering the error "could not find an available, non-overlapping IPv4 address pool among the defaults to assign to the network" in a network configuration context, what is the most likely cause?
A) The network interface card (NIC) is not properly configured.
B) The DNS settings are incorrect.
C) There is an overlap or exhaustion in the available IPv4 address pools.
D) The firewall rules are not properly set.