A PowerHA 6 cluster has missed too many heartbeats during a large disk write operation, and has
triggered the deadman switch. Which tunable can help ensure that HA Cluster Manager continues
to run?

A.
I/O Pacing and syncd frequency

B.
I/O Pacing and asynchronous I/O

C.
Syncd frequency and asynchronous I/O

D.
Asynchronous I/O and disk queue_depth