What is the correct order for Infoscale Availability to take the service group offline?

Consider the following resource dependency tree.

What is the correct order for Infoscale Availability to take the service group offline?
A . unmount file systems, deport disk group, stop volumes
B . deport disk groups, stop volumes, unmount file systems
C . unmount file systems, stop volumes, deport disk groups
D . stop volumes, unmount file system, deport disk groups

Answer: D