A stone is being whirled in a horizontal circle at constant speed. The string suddenly snaps when the stone is at point Q on the circle. Which path will the stone follow immediately after the string breaks?
a) It moves directly towards the centre.
b) It continues to follow the circular path for a short distance, then stops.
c) It moves straight along the tangent at point Q.
d) It moves outward along the radius away from the centre.