Which of the following commands lists all currently installed packages when using RPM package management?

`yum` does not support `--query` as a valid option - that flag belongs to the `rpm` command, not `yum`.

`yum` uses the subcommand syntax `yum list installed` rather than `--list --installed` with double-dash flags.

`rpm --query --all` uses the long-form options equivalent to `rpm -qa`, where `--query` (`-q`) enters query mode and `--all` (`-a`) selects all installed packages. This is a fundamental RPM query that reads the local RPM database and prints the name, version, and release of every installed package. It works without network access and directly queries the RPM database on the local system.

`rpm --list` is not a valid `rpm` option - listing installed packages requires the `--query --all` (`-qa`) syntax, not `--list`.