Zero Downtime Patching uses Fleet Patching and Provisioning to patch Oracle Grid Infrastructure without bringing down Oracle RAC database instances.
Which three statements are true about Zero-Downtime Oracle Grid Infrastructure Patching? (Choose three.)
Zero Downtime Patching (ZDP) requires out-of-place patching of Oracle Grid Infrastructure 19c with Oracle RAC or Oracle RAC One Node databases of 19c or later releases, and only the binaries in the Oracle Grid Infrastructure user space are patched. When using ZDP, Oracle Grid Infrastructure OS system software, kernel modules, and system commands, including ACFS, AFD, OLFS, and OKA, are not updated, which implies that updates are limited to user-space binaries. Additionally, ZDP can be fully automated by selecting the option to automatically run the root.sh script, providing a streamlined, hands-off approach.
looks like ACE
I would agree with A,B,C https://docs.oracle.com/en/database/oracle/oracle-database/19/cwlin/zero-downtime-oracle-grid-infrastructure-patching.html#GUID-471B87BF-3457-47BD-8858-316F4921EEE6