What is a consideration for a block based backup (BBB) installation and configuration?

What is a consideration for a block based backup (BBB) installation and configuration?
A . Client Direct should be disabled in the client configuration
B . Checkpoint restart and standard EMC NetWorker directives are not supported
C . Only Data Domain backup target devices are supported
D . Linux BBB package (lgtobbb) is required for full and incremental support

Answer: B