Going to a trip, Joe’s family was suddenly stopped in the middle of a road by an officer. They noticed straight ahead that other vehicles were put into halt as well. There is also an ambulance parked near a convenience store. As Joe peek from the glass window of the tinted car, he saw smoke coming from more than a dozen barrel spread along the area. Several men ahead are wearing white covered suit and their faces were somewhat covered. This is a possible
A. military attack by powerful men
B. dry run of a specialized team
C. hunting season going on
D. chemical leak caused by a road accident​