Final answer:
Joan is demonstrating B) deepening self-awareness as she reflects on her own feelings and realizes that Thomas is trying to establish his own role on the unit and needs guidance and affirmation.
Step-by-step explanation:
In this scenario, Joan demonstrates B) deepening self-awareness. She reflects on her own feelings of being threatened by Thomas's behavior and realizes that he is simply trying to establish his own role on the unit and not challenge her.
This self-awareness leads Joan to recognize that Thomas needs guidance, coaching, and affirmation rather than feeling irritated by his ideas. By demonstrating deepening self-awareness, Joan can work towards improving her relationship with Thomas and better meet his needs as a new graduate.