Which Is an Eccentric Function of the Flexor Digitorum Profundus

Which is an eccentric function of the flexor digitorum profundus?

A) restrains/slows extension of the forearm at the elbow joint
B) restrains/slows flexion of the arm at the glenohumeral joint
C) restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints
D) restrains/slows extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints