What does the ADEA prohibit concerning age discrimination?

The correct response indicates that the Age Discrimination in Employment Act (ADEA) prohibits age discrimination in all aspects of employment. This means that employers cannot discriminate against employees or applicants based on age when it comes to hiring, promotions, compensation, job training, and any other condition of employment.

The ADEA applies specifically to individuals aged 40 and older, ensuring that their rights are protected throughout the employment process. By covering all facets, the ADEA aims to create an equitable work environment where age should not be a barrier to employment opportunities and advancements.

The other choices focus narrowly on specific areas, which do not encompass the full scope of the ADEA's protections. For instance, limiting the prohibition to hiring practices overlooks its application to promotions, layoffs, and other employment conditions.