A customer plans to connect ESXi 5.0 hosts to a new EMC VNX array. They want to take
advantage of the hardware-assisted locking feature in VAAI. Which is a feature of hardware-assisted locking?

A.
Locking at the block level of a logical unit

B.
Locking the LUN instead of the block level

C.
Accessing a block from multiple hosts at the same time

D.
Automatic enabling of safe data caching