A ball bearing is gently released from rest and allowed to fall through a viscous fluid. Which of the following statements about the motion is correct?

A. its acceleration decreases before terminal velocity is attained
B. when terminal velocity is attained the acceleration of the fluid becomes zero
C. its velocity increases before terminal velocity is attained
D. there is no resultant force on the ball before it attains terminal velocity

Correct Answer: Option B

B. when terminal velocity is attained the acceleration of the fluid becomes zero