Tulgan, a consultant on generational workplace issues, estimates that $3\mathrm{.}5$ million people between the ages of $40$ and $58$ vanished from the American workforce from $2001$ to $2004.$ That's about $5$ percent of all baby$-$boomers. Tulgan writes, "Older white$-$collar workers are quickly becoming disenfranchised through no fault of their own. They have difficulty getting back into the job market, and when they do$,$ their compensation is often significantly reduced." The disenfranchisement of baby boomers is an example of:

bona fide discrimination

gender selectivity

quid pro quo selectivity