Which statement explains the difference between Normal …

Which statement explains the difference between Normal and High redundancy ASM failure groups?

A.
Normal redundancy protects the DATA diskgroup, whereas High redundancy protects the RECO diskgroup.

B.
Normal redundancy (best practice) provides protection against two simultaneous disk failures, whereas
High redundancy provides protection against a single disk failure or an entire storage server failure.

C.
High redundancy gives more usable storage, whereas Normal redundancy provides better I/O performance.

D.
Normal redundancy protects from disk failure when a cell is offline or being updated, whereas High
redundancy protects the system when all the cells are offline.

E.
Normal redundancy tolerates a single cell failure, whereas High redundancy tolerates a two-cell failure.

Explanation:
http://blog.umairmansoob.com/tag/using-high-vs-normal-redundancy-in-exadata/