Volcanoes forming along plate boundaries. I believe this is the correct answer because volcanoes don't happen randomly, the ring of fire is a just a bunch of volcanoes formed along what i think is a plate. So in my opinion answer choice B makes the most sense. (Hope this helps ya! :D)
The average speed of the car is essentially the same thing as the unit rate.
Here a car goes 300 km for every 6 hours. To find the unit rate, we must find how many kilometers it goes per hour. To do so, we can divide 300 by 6 to get a total of 50km/h.
