Final answer:
The correct option is a. Practicing selective hiring.
Practicing selective hiring and being overly ambitious are common management mistakes, while allowing others to express their viewpoint is not.
Step-by-step explanation:
One common management mistake is practicing selective hiring. Selective hiring occurs when a manager only hires individuals who possess certain characteristics or fit a specific profile, rather than focusing on a diverse range of skills and qualifications. This can limit the organization's talent pool and hinder innovation and creativity.
Another common management mistake is being overly ambitious. While ambition can be beneficial, an overly ambitious manager may set unrealistic goals or deadlines, leading to increased stress and burnout among employees.
Allowing others to express their viewpoint can actually be a positive management practice, promoting open communication and fostering a sense of inclusion. Therefore, it is not considered a common management mistake.