Briefing Apple Knowledge

What does this indicate?

Juan attempted to install OS X onto an iMac by copying the hard drive of a different Mac he owns. The prohibitory symbol. What does this indicate?

A.
The iMac is unable to find a startup disk that contains boot files.

B.
The version of OS X is not compatible with the iMac hardware.

C.
The source volume is damaged and cannot be read.

D.
A RAM module is having trouble