The Scooter Store notified its employees at 5 p. m. on Friday that it is laying off two-thirds of its workforce as of today, and told them not to come in on Monday. It failed to provide advance notice to anyone and in doing so likely violated:

The worker adjustment and retraining notification act

Explanation:

The Worker Adjustment and Retraining Notification Act of 1988 is a labor law in the United States which protects employees, their relations, and immediate communities by stipulating that most employers with 100 or more employees to give 60 calendar-day advance notification of plant closing day and any mass layoffs of its employees, this is to prevent any shock in job loss on the part of the employee.

i would say b. research typically uses a variety of sources