Professional appearance is critical in the front office of a hotel to create a positive impression on guests.
- Wearing uncleaned and wrinkled uniform is unprofessional and should be avoided.
- Keeping long hair open is acceptable as long as it is neat and does not interfere with the job.
- Always being overdressed is unnecessary, as being appropriately dressed is what matters most.
However, Maintaining good personal hygiene is essential to ensure a clean, fresh, and professional appearance.
Thus, the correct answer is Maintaining good personal hygiene.