The correct answer is C) ideas about justice.
The aspect of Jesus's teachings that would influence Roman and other legal systems is ideas about justice.
Jesus of Nazareth was known as the Master of Love. He preached about love but also justice and to do good. You can read about his life and death in the New Testament of the Bible. There you can find information on the four gospels: Mark, Mattew, John, and Luke. His wisdom and life later influence ideas about justice in Rome and other places.