According to management consultant "Robert Kelley", an effective followers are the type of followers that think for themselves. The Option D is correct.
According to the model developed by Robert Kelley of Carnegie Mellon University, he defined an effective followers as are employees who not only engage in their work but who also use independent, critical thinking in their work roles. These type of employees are self-managed, committed to organizational goals, competent, brave, honest and reliable.
Read more about effective followers
brainly.com/question/8310222
#SPJ1