Answer: (c) will move along a straight line tangential to the circular path
At any instance of time objects in circular motion tend to be in rectilinear motion. The object keeps on moving due to centripetal force and it moves along a straight line tangential to the circular path when strings break.
Circular motion is described as a movement of an object while rotating along a circular path. Circular motion can be either uniform or non-uniform. During uniform circular motion the angular rate of rotation and speed will be constant while during non-uniform motion the rate of rotation keeps changing.