Which one of the following programs will only find files that are in your PATH?

Which one of the following programs will only find files that are in your PATH?

A.
locate

B.
slocate

C.
which

D.
find

Explanation/Reference:
From the man pages:
which  returns  the  pathnames of the files (or links) which would be executed in the current environment, had its arguments been given as commands in a strictly POSIX-conformant shell.  It does this by searching the PATH for executable files matching the names of the arguments. It does not follow symbolic links.