Which of the following describes an aspect of the SVC for XIV offering?（）

• A、SVC software that comes integrated in an XIV system 
• B、SVC option that includes all functions of SVC at a 'per TB' charge 
• C、SVC option that introduces a 'per enclosure' charge metric for all functions of SVC 
• D、separate license available for XIV/SVC customers who need FlashCopy and Metro Mirror/Global Mirror functions