CORRECT TEXT
If the module file name is given without directories or extension, insmod will search for the module in some common default directories. What environment variable
can be used to override this:

Answer: MODPATH

Explanation:
If the module file name is given without directories or extension, insmod will search for the module in some common default directories. The environment variable
MODPATH can be used to override this default. If a module configuration file such as /etc/modules.conf exists, it will override the paths defined in MODPATH.