What a DHCP starvation attack consists of$?$

Question $21$Answer

a$.$

Acknowledging to DHCP offers spoofing the victim's IP address

b$.$

Sending DHCP Discovery packets to multiple servers in the network

c$.$

Sending a large number of DHCP requests from fake MAC addresses

d$.$

Responding to all broadcast DHCP requests on the network with fake IP leases