In an action alleging a violation of this subtitle based on harassment, an employer is liable: for the acts or omissions toward an employee or applicant for employment committed by an individual who: undertakes or recommends tangible employment actions affecting the employee or an applicant for employment, including hiring, firing, promoting, demoting, and reassigning the employee or an applicant for employment; or directs, supervises, or evaluates the work activities of the employee; or if the negligence of the employer led to the harassment or continuation of harassment.