The tyrant . . . . . . . . anyone whom he regarded as a rival.

massacred
killed
exterminated
slaughtered

The correct answer is: B. killed

The other options are:

  • A. massacred: to kill a large number of people, especially in a cruel or violent way.
  • C. exterminated: to destroy completely.
  • D. slaughtered: to kill a large number of animals, especially in a cruel or violent way.

The tyrant killed anyone whom he regarded as a rival. This means that he murdered them, usually in a cruel or violent way. The other options are not as accurate because they do not specifically mention killing.