If Arthur $($who is still a terrible person$)$ is the vice president of marketing at BBB and he constantly makes fun of George, an employee in the engineering division of BBB$,$ for being $60$ years old, will BBB be held liable for Arthur's harassment of George?

$$ No$,$ because Arthur is a supervisor but he didn't make an adverse employment decision with respect to George.

$$ No$,$ if BBB took reasonable steps to correct the situation once it found out about it$.$

$$ Yes, because Arthur is a supervisor.

Yes, but only if George was fired or demoted.