What is considered a protected class under Title VII of the Civil Rights Act?

The correct choice identifies the specific categories of individuals that Title VII of the Civil Rights Act protects from discrimination in employment. This legislation prohibits employment discrimination based on various characteristics that have been historically marginalized. The protected classes under Title VII include race, color, national origin, religion, and gender.

This means that employers cannot make hiring, firing, or promotion decisions based on these characteristics. The intent of Title VII is to ensure fair treatment and equality in the workplace, regardless of an employee's background or personal attributes related to these specific categories.

The other options do not accurately capture the essence of what Title VII protects. For instance, mentioning individuals over 40 years old pertains to the Age Discrimination in Employment Act, which is separate legislation; a broader inclusion of all employees regardless of skill level doesn't address the specific characteristics protected under Title VII; and stating only U.S. citizens refers to immigration laws but omits various non-citizens who may also belong to protected classes. Thus, the answer highlights the focus of Title VII on preventing discrimination based on race, color, national origin, religion, and gender.