(Choose two.)

Identify two reasons for the gc current block busy wait event. (Choose two.)

A.
A block is busy in the local cache.

B.
A block is busy in the remote cache.

C.
The Cluster Interconnect is congested.

D.
Either the local or remote CPUs have too large a run queue.

Explanation:
https://docs.oracle.com/cd/B28359_01/rac.111/b28254/monitor.htm#RACAD976