C . Had something like this in a mock-licenses are Starter, Pro, Ultimate for paid Nutanix clusters. The rest aren't real options, and Community Edition isn't commercial licensing. If someone has seen otherwise recently let me know.
C or A. Official docs and practice exams usually mention Starter, Pro, Ultimate (C) for paid/production clusters, but Community Edition (A) sometimes shows up in other contexts. You might want to double-check with recent study guides or the Nutanix website to confirm which tiers count for official scenarios. I think C is what they'd expect here, but not 100% sure.