Which method is supported for backing up the virtual machine that contains vCenter Server?
A. incremental
B. individual disks
C. differential
D. full image
Reference:
https://pubs.vmware.com/vsphere-60/index.jsp?topic=%2Fcom.vmware.vsphere.install.doc%
2FGUID-539B47B4-114B-49BC-9736-F14058127ECA.html