Why does an HP EVA distribute spare capacity across multiple spindles?

A.
so data can be replicated in each spindle for greater fault tolerance

B.
to make RAID 0 data recoverable in case of a drive failure

C.
so that RAID 0, RAID 1, and RAID 5 data can be equally balanced within the spare space of the disk
group

D.
to achieve faster rebuild times in case of a drive failure

Explanation:

Reference:
ftp://ftp.compaq.com/pub/products/storageworks/whitepapers/5982-8671EN.pdf (Page 7,
Distributed sparing, second paragraph)