What is the problem?

An administrator is troubleshooting an endpoint that is supposed to bypass 802.1X and use MAB. The endpoint is bypassing 802.1X and successfully getting network access using MAB, however the endpoint cannot communicate because it cannot obtain an IP address.
What is the problem?
A. The endpoint is using the wrong protocol to authenticate with Cisco ISE.
B. The 802.1X timeout period is too long.
C. The DHCP probe for Cisco ISE is not working as expected.
D. An ACL on the port is blocking HTTP traffic.