Identify the correct command that will change the cardinality to three.

The Flex ASM instances in your four-node cluster currently have a cardinality of two. Identify the
correct command that will change the cardinality to three.

A.
$ srvctl modify asm –cardinality 3

B.
$ srvctl update asm –count=3

C.
$ srvctl modify asm –count 3

D.
$ srvctl modify flex count = 3

Explanation:
You can modify the Oracle ASM instance count , or cardinality, with the SRVCTL modify asm
command. For example:
$ srvctl modify asm -count 4
$ srvctl modify asm -count ALL

https://docs.oracle.com/database/121/OSTMG/asminst.htm#OSTMG95329