In Oracle RAC deployment, after completing installing Grid software, what is the common used command description? (Multiple choice)

In Oracle RAC deployment, after completing installing Grid software, what is the common used command description? (Multiple choice)
A . Check the cluster nodes:
olsnodes -n
B . Check the status of the cluster:
crsctl check cluster-all
crsctl check crs
C . Check clusterware resource status:
crsctl stat ser -t
D . Check the Oracle ASM operating states:
ocrcheck

Answer: ABD