While configuring Cisco TrustSec on Cisco IOS devices, the engineer must set the CTS device ID and password in order for the devices to authenticate with each other. However, after this is complete, the devices are not able to properly authenticate. What issue would cause this to happen even if the device ID and passwords are correct?

A. EAP-FAST is not enabled. B. The SGT mappings have not been defined. C. The device aliases are not matching. D. The devices are missing the configuration cts credentials trustsec verify 1.