Within the Worker Adjustment and Retraining Notification Act, There Are

Within the Worker Adjustment and Retraining Notification Act, there are rules for notifying employees of mass layoffs and plant closings. There are, however, three exceptions to the notification time limit. Which one of the following is a valid exception to the notification time limit for a plant closing?

A) Natural disaster
B) Death of business owner
C) Acquisition of firm by competition
D) Replacement of jobs from one state to another