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