In a CDP environment, what happens when the CDP interface on an adjacent device is configured without an IP address?

In a CDP environment, what happens when the CDP interface on an adjacent device is configured without an IP address?

A. CDP becomes inoperable on that neighbor B. CDP uses the IP address of another interface for that neighbor C. CDP operates normally, but it cannot provide IP address information for that neighbor D. CDP operates normally, but it cannot provide any information for that neighbor