What does this command do?

Examine this command executed on the first node of a four-node cluster:
$ <DATABASE_ORACLE_HOME>/0Patch/opatch apply 18031528
What does this command do?

A.
It applies a patch to one ORACLE_HOME only on the first cluster node.

B.
It applies a patch to all database ORACLE_HOMEs with the same release only on the first cluster node.

C.
It applies a patch to one ORACLE_HOME on all cluster nodes.

D.
It applies a patch to all database ORACLE_HOMEs with the same release on all cluster nodes.

E.
It applies a patch to all database ORACLE_HOMEs with the same release on the first cluster node.