A boy holds the end of a rubber cord from which hangs a solid metal ball, if the boy whirls the ball in a horizontal circle, keeping his hand still. If the rubber cord breaks when the ball is at a point on the circle, in what direction will the ball move?

A. towards the hand of the boy
B. away from the hand of the boy
C. in the direction of the tangent to the circle at the point of break  
D. None of the above

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Correct Answer: C