How are wireless endpoints registered in the HTDB in a Cisco SD-Access architecture?

How are wireless endpoints registered in the HTDB in a Cisco SD-Access architecture?

A. Border nodes first register endpoints and then update the HTDB. B. Fabric WLCs update the HTDB as new clients connect to the wireless network. C. Fabric APs update the HTDB with the clients' EID and RLOC. D. Fabric edge nodes update the HTDB based on CAPPWAP messaging from the AP.