Which three statements are true about Oracle Clusterware 12c Flex Cluster architecture? 

Answer options:

A. Each leaf node must be connected to storage shared across all cluster nodes.
B. Hub nodes require direct access to the voting disks.
C. Each leaf node must be connected to storage shared across all leaf nodes.
D. Each hub node must be connected to storage shared across all hub nodes.
E. Hub nodes require direct access to the OCR file.
F. Leaf nodes require direct access to the voting disks.

BED

BE: In Oracle Flex Cluster, only Hub nodes will have direct access to the OCR/Voting disks. D: The Leaf nodes are different from the Hub nodes. They dont need to have direct access to the underlying storage; rather they access the storage/data through Hub nodes. References: http://allthingsoracle.com/oracle-database-12c-new-features-part-3/