What is the function of a Forward Common Assignment Channel (F-CACH)?

• A. It instructs the Mobile Station about which R-CCCH to use to send access messages.
• B. It instructs the Mobile Station about which F-CPCH Sub-Channel to use to receive power control bits
• C. F-CACH messages are in response to R-EACH to the base station. F-CACH is always used along with F-CPCCH, R-EACH and R-CCCH.
• D. All the above