Which Is an Action of the Flexor Digitorum Superficialis

Multiple Choice

Which is an action of the flexor digitorum superficialis?

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