The correct answer is: c. They both experience the same acceleration.
In a vacuum, where there is no air resistance, both the bowling pin and the bowling ball would experience the same gravitational acceleration, which is approximately 9.81 m/s² towards the Earth. However, if we are considering air resistance, the bowling ball is much more massive than the bowling pin, so it may appear to accelerate faster due to its larger inertia, but in the absence of air resistance, they both fall at the same rate.