What is the maximum number of earrings allowed per ear at Denny's?

The correct answer is that employees at Denny's are allowed to wear one set of earrings smaller than a quarter per ear. This policy is designed to maintain a professional appearance while allowing some personal expression through accessories. By specifying a size limit, Denny's ensures that earrings remain discreet and do not distract from the restaurant's family-friendly environment.

In contrast to the other options, allowing two pairs or simply a single pair could lead to excessive adornment, which might not align with the company’s standards for a neat and polished appearance. Furthermore, stating that no earrings are allowed would limit personal expression completely, which is not the case in Denny's policy as it permits earrings within specific guidelines.