Explain in what ways a person's failure to apply the attitude of "taking the initiative" will impact his or her chances of getting a promotion

What will be an ideal response?

Answers will vary but should include some or all of the following points:
Often people are not promoted because they do not take advantage of the opportunities they are given. If you do not make yourself invaluable to the dental practice, let your supervisor know that you are willing to work hard, and do more than just what is necessary to keep your job, there will be no reason for your supervisors to feel that they should give you a promotion. Such behavior is noticed in an employee.