Task: Question Answering
Input (English): A ball is dropped from the top of a tall building. As the ball falls, the upward force of air resistance becomes equal to the downward pull of gravity. When these two forces become equal in magnitude, the ball will      
 (A) flatten due to the forces. (B) fall at a constant speed. (C) continue to speed up. (D) slow to a stop.
Output (English): B