A Unity storage system is installed with 10 Gb optical SFPs in CNA ports 4 and 5 of both Storage Processors.The storage administrator has had a request from a user to connect to the storage system through Fibre
Channel.
How can the administrator reconfigure the CNA ports for 16Gb Fibre Channel SFPs?

A.
Configure all CNA ports for 16Gb Fibre Channel

B.
Configure CNA port 4 of SPA and SPB as 10Gb optical
Configure CNA port 5 of SPA and SPB as 16 Gb Fibre Channel

C.
Configure CNA port 4 and 5 of SPA as 10 Gb optical
Configure CNA ports 4 and 5 of SPB as 16 Gb Fibre Channel

D.
CNA ports cannot be reconfigured once they are committed

Explanation:
Once you set the network protocol on the CNA ports you cannot switch to a different network protocol.
https://www.emc.com/collateral/TechnicalDocument/docu60144.pdf (page 5)