What is local segmentation capability in Vertica?

A.
Vertica automatically splits current segments in half to redistribute them to new nodes.

B.
Vertica automatically partitions the data, allowing partitions to be dropped and recreated on
new nodes.

C.
Vertica automatically creates more segments than are currently needed, allowing some
segments to be moved to new nodes as needed.

D.
Vertica automatically partitions the segmented data, allowing some partitions to be moved to
new nodes as needed.

Explanation:
http://vertica-forums.com/viewtopic.php?f=5&t=874