Final answer:
Grooming standards often require sideburns to be neatly trimmed and tapered. This ensures that they blend with the individual's hairstyle and maintain a professional appearance.
Step-by-step explanation:
The grooming standards for sideburns vary depending on the context, such as workplace policies, military regulations, or personal preference. However, when it comes to a general standard, particularly in professional settings, sideburns must be neatly trimmed and tapered. This means that the sideburns should blend with the hairstyle and should not be excessively long or bushy.
Option B is typically the correct answer in most cases involving grooming guidelines: Sideburns must be neatly trimmed and tapered. They should be kept clean and well-maintained to ensure a professional appearance. Moreover, the length and style of sideburns may be subject to specific organizational policies or cultural norms.