You are experimenting with a binary in /tmp/foo.d that expects its configuration file at /etc/foo.conf.
You don’t want to save it there, but use a symbolic link to /tmp/foo.d/foo.conf instead. Which command would accomplish that?

A.
ln -s /tmp/foo.d/foo.conf /etc/foo.conf

B.
ln /tmp/foo.d/foo.conf /etc/foo.conf

C.
ln -s /etc/foo.conf /tmp/foo.d/foo.conf

D.
ln /etc/foo.conf /tmp/foo.d/foo.conf

Explanation:

There are two types of link a. Soft link b. Hard link.
b. Soft link Can create for directory also, can span multiple partitions but available until and
unless Original Files remain. Syntax for Soft link ln -s originalfile linkfile
b. Hard link One separate Physical File, can’t create for directory, can’t span multiple file but
remains the link file if original file removed.
Syntax for Hard link ln originalfile linkfile