Which of the following would be considered grounds for a sexual harassment charge?

A、jokesthathadasexualthemebutnoonefoundoffensive
B、artworkthat,whilesomeconsideredclassic,madesomeemployeesfeeluncomfortable
C、hiringamaleemployeewhohadbeenpreviouslyconvictedofasexcrime
D、consensualdatingbetweenanemployeeandsupervisor