The traditional view of the Roman emperor Caligula as a cruel and insane tyrant has been challenged by some modern historians. They point out that little documentation of Caligula' s alleged cruelty or outrageous behavior survives from the time of his reign and that the histories that have come down to us were written by his enemies. Which one of the following, if true, adds the most support for the challenge from the modem historians? ['People who have lived under someone regarded as a cruel tyrant are more likely to view that person unfavorably than favorably.', 'The specific outrageous acts attributed to Caligula in Roman documentation are very similar to acts attributed in earlier writings to other rulers alleged to be cruel tyrants.', "There is less documentation of any sort from Caligula's reign than from the reigns of most other Roman emperors of Caligula's era.", 'There is ample documentation of modern tyrants being responsible for outrageous acts worse than those attributed to Caligula.']