Why does changing the volume of a container change the pressure of the gas in it?
a: changing the volume reduces the number of molecules so they hit the walls of the container less often.
b: changing the volume reduces the force with which the molecules hit the walls of the container.
c: changing the volume increases the speed of the molecules so they hit the walls of the container more often.
d: changing the volume increases the area that the molecules collide with so the force is spread over a larger area.

i think it's d but not sure