Final answer:
The unique material in Luke emphasizes the marginalized people group.
Step-by-step explanation:
The unique material in Luke emphasizes the marginalized people group.
Option a) is correct: The unique material centers on the parables of Jesus and emphasizes the marginalized. Luke's Gospel contains several parables that highlight the needs and concerns of the poor, outcasts, and social outcasts. Luke's portrayal of Jesus often shows his compassion for those on the margins of society. This emphasis on the marginalized is a distinctive feature of Luke's Gospel compared to the other Gospels.