Charlton Wayne, aged $63,$ was a manager at the Old World Exotic Wood Furniture Company. His supervisor, Shaunte, frequently made age$-$related comments about Charlton to other workers. These included calling him "old man," "old fogey," and "old fart." On one occasion, when Charlton arrived for a meeting, she told another employee to $"$go get the wheelchair for the senior citizen." At a different meeting, she asked Charlton, "what's your idea, old$-$timer?" Charlton decided he'd had enough and filed a complaint under the ADEA. Charlton can make out a prima facie case of:

$$ quid pro quo discrimination.

no sort of discrimination.

hostile work environment discrimination.

$$ disparate impact discrimination.