Where are most of the binaries located on the hard drive of a UNIX server (using default installation)?

A.
/bin

B.
/sbin

C.
/usr

D.
/proc

Explanation:
Most of the binaries will be located in the /usr directory. Many other binaries are in subdirectories of the /usr directory.
Incorrect Answers:
A: /bin holds system commands, and is really /usr/bin
B: /sbin holds administrative commands, and I really /usr/sbin
D: /proc is used for access to kernel variables,