Answer:
a. supporting leader style
Step-by-step explanation:
in a supporting leadership style, the head of the team is aim at developing his or her team member (sub ordinate), training them to be independent and guide them on how to achieve a given task.
in this scenario, Julia shows a supporting leadership style by:
providing aid and guidance to her subordinates and
acknowledging their accomplishments and allows them to provide suggestions.
She is trying to help her subordinate to achieve the challenge tasks given to them.