Which Is an Action of the Extensor Digiti Minimi

Which is an action of the extensor digiti minimi?

A) extension of the little finger (finger number five) at the metacarpophalangeal and proximal and distal interphalangeal joints
B) flexion of the little finger (finger number five) at the metacarpophalangeal and proximal and distal interphalangeal joints
C) flexion of the hand at the wrist joint
D) flexion of the thumb at the carpometacarpal,metacarpophalangeal,and interphalangeal joints