Probably a third party contractor was responsible for operating this
A large company's HR organization knows it isn't legal to even ASK what race someone is during the application process, and such a selection wouldn't pass muster regardless of what nomenclature was used.
Or if that page was run by IBM, maybe they have a discontented employee who altered the page as a last act after he got his layoff notice?
I mean, I'm all for calling out companies that do stupid shit, but this is way too stupid to even be believable. "Yellow", c'mon now!