In 1981, Ian Murphy broke into the AT&T online computer system and changed their clocks, allowing people to make calls during the day at a discounted rate. Based on the list of defining factors for computer crimes, what best describes Murphy's crime?

A.
intentionally disrupting, degrading, or destroying information or services on a computer

B.
disclosing any data or information obtained through illegal online activity

C.
knowingly receiving or holding onto any data or information obtained through illegal online activity

D.
intentionally or recklessly tampering with, taking, transferring, concealing, altering, or damaging physical computer equipment