A car is approaching & right-angled intersection from the north at 70 mph and & truck is traveling to the east at 60 mph When the car is 1.5 miles north of the intersection and the truck is 2 miles to the east; at what rate, in miles per hour; is the distance between the car and truck is changing?
(A) Decreasing 15 miles per hour
(B) Decreasing 9 miles per hour
(C) Increasing 6 miles per hour
(D) Increasing 12 miles per hour