What is the outcome of a Save Device pool running out of free space in a TimeFinder/Snap environment?

A.
Snap session will request space from a designated save pool device

B.
Target VDEV device becomes Not Ready (NR) and Copy-On-Write is disabled

C.
Snap sessions will be marked as “Failed” and all virtual devices will be unavailable

D.
Snap sessions will be marked as degraded with virtual devices continuing to be available