Which Are Eccentric Functions of the Extensor Digitorum

Which are eccentric functions of the extensor digitorum?

A) restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and extension of the hand at the wrist joint
B) restrains/slows extension of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and radial deviation (abduction) of the hand at the wrist joint
C) restrains/slows extension of the forearm at the elbow joint and extension of the hand at the wrist joint
D) restrains/slows flexion of fingers two through five at the metacarpophalangeal and proximal and distal interphalangeal joints and flexion of the hand at the wrist joint