When Flexing All of the Fingers Joints Maximally in Combination

When flexing all of the fingers joints maximally in combination with maximal wrist flexion and no further flexion of any of the involved joints may be reached, the result is _______.

A) Active insufficiency of the extensor muscles
B) Active insufficiency of the flexor muscles
C) Passive insufficiency of the flexor muscles
D) Stretch-shortening of the extensor muscles