A historian argues that the Roman leader Julius Caesar was assassinated because he was secretly plotting to overthrow the Roman Republic and declare himself emperor of Rome. Which of the following, if true, would be a strong counterclaim to the historian's claim?
A. Many Roman leaders before Caesar had attempted to eliminate the republic, but had ultimately failed.
B. Following Julius Caesar's assassination, the Roman Republic really was replaced by the Roman Empire.
C. Julius Caesar has been widely studied by historians, so there are many primary and secondary sources about him.
D. Personal letters written by Julius Caesar indicate that he believed that Rome should always remain a republic.