Which DHCP messages are discarded from interfaces that are configured as untrusted?

A) Discover
B) Request
C) Offer
D) Ack

C, D
Explanation: C) The DHCP snooping feature will discard the DHCP Offer and Ack packets if they are received on interfaces that are configured as untrusted (all interfaces by default).
D) The DHCP snooping feature will discard the DHCP Offer and Ack packets if they are received on interfaces that are configured as untrusted (all interfaces by default).