Which answer is a correct method for instructing the Sun Ray about its firmware server location?

Which answer is a correct method for instructing the Sun Ray about its firmware server location?

A.
Create a DNS entry for sunray servers.

B.
Set DHCP standard option 66.

C.
Createasunray-config-servers=entry in the TFTP .parmsfile.

D.
SetDHCP standard option 49.

Explanation:
http://docs.oracle.com/html/E22661_15/Clients-Howto-Prepare-Config-Files.html