What is an example of a “protected class” under employment law?

A "protected class" under employment law refers to a group of individuals who are legally protected from discrimination based on certain characteristics. Age is one such characteristic that is recognized as a protected class, particularly under the Age Discrimination in Employment Act (ADEA). This law protects individuals who are 40 years of age and older from discrimination in various employment practices based on their age.

In contrast, the other options do not fall under protected classes established by employment law. Employment duration, job title, and company size are not attributes that provide legal protection against discrimination. Laws focused on protected classes aim to promote equality and prevent discrimination on the basis of specific personal attributes like race, gender, nationality, and age, ensuring that individuals are treated fairly in the workplace.