What is the correct address to access the Web UI for Gaia platform via browser?

Joey want to configure NTP on R80 Security Management Server. He decided to do this via WebUI .

What is the correct address to access the Web UI for Gaia platform via browser?
A . https://<Device_IP_Adress>
B . http://<Device IP_Address>:443
C . https://<Device_IP_Address>:10000
D . https://<Device_IP_Address>:4434

Answer: A