Which is the result of enabling IP Source Guard on an untrusted switch port that does not have DHCP snooping enabled？（）
- ADHCP requests will be switched in the software， which may result in lengthy response times.
- BThe switch will run out of ACL hardware resources.
- CAll DHCP requests will pass through the switch untested.
- DThe DHCP server reply will be dropped and the client will not be able to obtain an IP address.