What is the most likely reason?

User Joseph has successfully extracted and compiled a program from source code. Installing the
binaries produces errors. What is the most likely reason?

A.
The source code was compiled for a different CPU

B.
The permissions set in the /usr/bin directory are wrong

C.
The binaries require root privileges to be installed

D.
The wrong prefix was used during configuration of the source code

Explanation:
/usr/local usually requires root privileges to write to