What describes multiple LUN snapshots?

A.
Captures multiple point-in-time data states.
Snapshot data state is marked “unmodified” from its source when attached.
Snapshot tree supports multiple simultaneous attaches.

B.
Captures multiple point-in-time data states.
Snapshot data state is marked “unmodified” from its source when attached.
Snapshot tree supports only one attach at a time.

C.
Captures multiple point-in-time data states.
Snapshot data state is marked “modified” from its source when attached.
Snapshot tree supports multiple simultaneous attaches.

D.
Captures multiple point-in-time data states.
Snapshot data state is marked “modified” from its source when attached.
Snapshot tree supports only one attach at a time.

Explanation:
Only a single snapshot per LUN can be attached at any given time, and must be detached prior to attaching
another snapshot of the same LUN.

https://www.emc.com/collateral/white-papers/h15089-emc-unity-snapshots.pdf (page 9)