In a study by Arvidsson and colleagues on situational leadership using air traffic controllers as the subjects,researchers found the least often used leadership style was ______.

A) S1
B) S2
C) S3
D) S4

The study by Arvidsson and colleagues on situational leadership using air traffic controllers found that the least often used leadership style was S1. This style, characterized by high directive and low supportive behavior, was less prevalent in the dynamic and complex environment of air traffic control, where more adaptive and supportive leadership styles are necessary.