What Is the Principle Requirement of the Worker Adjustment and Retraining

What is the principle requirement of the Worker Adjustment and Retraining Notification Act (WARN) of 1988?

A) Employers must give severance pay to workers who permanently lose their jobs.
B) Most employers must give 60 days' notice if a mass layoff or facility closing is to occur.
C) Workers must be given the opportunity to relocate if the company is moving the plant.
D) Workers under age 50 are entitled to a retraining allowance if their jobs are eliminated.