Which of the following is NOT considered part of proper facial hair guidelines?

The choice indicating "unkempt styles" is not considered part of proper facial hair guidelines because grooming and maintenance are essential components of an acceptable appearance in professional settings. Proper facial hair guidelines typically emphasize that facial hair should be neatly maintained to convey professionalism and attention to personal grooming.

In contrast, a mustache, beard, and neatly trimmed styles are all aspects that align with grooming norms and expectations in many environments. An unkempt style, on the other hand, can come across as negligent or unprofessional, which is why it is excluded from the guidelines. Maintaining facial hair in a clean and groomed manner reflects an individual's care for their presentation and can positively impact perceptions in professional interactions.