The answer is B... Hope this helps :)
I believe its internal validity
Computer mediated communication is defined as any human communication that occurs through the use of two or more electronic device. the way humans communicate in professional, social and educational setting varies widely. the study of communication to achieve collaboration.
Jerusalem.
Home of the:
Temple of Jerusalem (Judaism)
Crucifixion of Jesus Christ (Christianity)
Dome of the Rock (Islam)
Also the site of multiple crusades (except the one where they sacked Constantinople)
