A worker is protected from discrimination on the basis of race or color, religion, gender, or national origin by the...

Title VII of the Civil Rights Act of 1964 protects workers from discrimination based on race, color, religion, sex, and national origin. The Rehabilitation Act addresses disability discrimination in certain settings, while the Age Discrimination Act concerns age. Therefore, the correct choice is the Civil Rights Act of 1964.

AI-written and checked against the verified answer.