Modprobe will automatically load all base modules needed in the module stack as described by
its dependency file. What file is this?

A.
modules.dep

B.
modprobe.dep

C.
module.dep

D.
modep.dep

Explanation:
depmod creates a list of module dependencies, by reading each module under /lib/modules/version and determining what symbols it exports, and what symbols it
needs. By default this list is written to modules.dep in the same directory. The normal use of depmod is to include the line /sbin/depmod -a in one of the files in /etc/
rc.d so the correct module dependencies will be available after booting the system. depmod -e prints a list of all unresolved symbols. When you tried to load the
modules using modprobe command it checks the modules.dep file generated by depmod command to identify the dependencies and load all dependencies as well.