Joan works for the City Building and Records Department. She was hired a year before Derrick who works in her department. One day, Derrick complained to her about her jewelry, a small gold cross she wore as a necklace. He told her that it offended him and that she shouldn't wear it again. When she refused, he complained to their mutual supervisor. At her annual review, the supervisor cited her persistence in wearing the cross as an indication of homophobia that offended her fellow workers. Joan did not receive a pay increase that year, and when the supervisor retired two months later, Derrick was hired into that position. Derrick promptly fired Joan.
If this was an actual incident, what recourse does Joan have?