Answer: Delegating leadership style
Explanation: Delegating leadership style according to situational leadership style is a style of leadership where superiors or leaders assign a particular work or task to their subordinate or employee without supervision, thus giving them free reign to carry out the task. In this leadership style, the leader must be certain that the subordinates or employees can carryout the assign task on their own before giving them that responsibility i.e having relevant experience is paramount.
Sarah's team have many years of experience, therefore the most appropriate leadership style she should demonstrate is the delegating leadership style.