Which of the following occurs if one particular kind of people (e. g., women, minorities) are not hired at the rate of at least 80 percent of the best-achieving groups (e. g., men, non-minorities)? a. the employer's liability for the actions of supervisors in creating the harassmentb. retaliation against an employee who participated in an inverstigationc. an offer of promotion or pay raise in exchange for sex d. verbal or physical conduct of a sexual nature