Centripetal force on an object in circular motion is always directed in which direction?
a. toward the center of the circle
b. away from the center of the circle
c. in the direction of the object's velocity
d. in a direction opposite to the object's velocity

The centripetal force is the resultant force that causes this acceleration, and it is always directed towards the center of the circle. Without the resultant centripetal force, an object would travel at a constant velocity (constant speed and direction).

So the correct answer would be A : Toward the center of the circle. 

Hope this helps :)

It indicates no change in temperature and the process of matter changing its state