how should a company determine whether a grievance is valid?\na. through an hr investigation\nb. through…

Brief Explanations:

An impartial investigation is the most appropriate way to determine the validity of a grievance as it ensures fairness and objectivity. An HR - led investigation may have biases related to the company's internal interests. Negotiation is for resolving issues after their validity is determined. Police investigation is usually for criminal - related matters, not typical workplace grievances.

Answer:

D. Through impartial investigation