What is the $$duty to mitigate$?$

a$.$ amount that the employer is required to pay in reasonable notice

b$.$ It is a duty of the employer to create a less hostile environment by taking seriously employee complaints about harassment

c$.$ It is a duty of the employee that she will treat her employer$$s interests as more important than her own in the context of the workplace

d$.$ It is a duty of the employer that requires that she lessen the inherently negative impact of termination by engaging in $$good faith$$ during the process