A ball is let go from rest. Both the distance through which the ball drops and the time taken for it to drop that distance are measured. The percentage uncertainty in the measured distance is negligible. The percentage uncertainty in the measured time is $4\%$. These measurements are then used to determine the acceleration of free fall. Air resistance is negligible. What is the percentage uncertainty in the calculated value of the acceleration of free fall?
- A2%
- B4%
- C8%
- D16%