What should leaders keep in mind as they focus on authentic leadership? a. This style of leadership is still in the formative stages and lacks evidence-based findings about its effectiveness. b. This style of leadership can be difficult to achieve and is reserved for those specially gifted with charismatic traits. c. This style of leadership tends to work best for lower-level management with followers who desire clear direction. d. This style of leadership has been proven to be the most effective style of leadership and should be adopted whenever possible