Which of the following environment variables overrides or extends the list of directories holding shared libraries?

`LD_LOAD_PATH` is not a standard environment variable used for specifying shared library search paths in Linux.

`LD_LIB_PATH` is not the correct standard environment variable for this purpose; it is a common misspelling of `LD_LIBRARY_PATH`.

The `LD_LIBRARY_PATH` environment variable is specifically designed to override or extend the default search paths for dynamic linker/loader to find shared libraries, allowing users to test newer library versions or custom libraries without modifying system configurations. When an application attempts to load a shared library, the dynamic linker first checks the directories specified in this variable.

`LD_SHARE_PATH` is not a recognized environment variable for controlling shared library search paths.

`LD_RUN_PATH` is a linker option for embedding library search paths into an executable at compile time, not an environment variable for runtime overriding.