You are at an amusement park and watching people on a roller coaster. you notice that when the roller coaster is traveling at high speeds and turns left, the riders in the coaster appear to lean to the right. You determine that the reason this is occoring is because some force is acting upon the riders. What force would be responceable for this action.
A: Intermolecular forces
B: Inertia
C: Tension
D: Centripetal force