Which Difference Between the Flexor Digitorum Superficialis and the Flexor

Which difference between the flexor digitorum superficialis and the flexor digitorum profundus is true?

A) the flexor digitorum superficialis can flex the fingers at the distal interphalangeal joint;the flexor digitorum profundus cannot
B) the flexor digitorum profundus can flex the forearm at the elbow joint;the flexor digitorum superficialis cannot
C) the flexor digitorum superficialis can only flex fingers two through four;the flexor digitorum profundus can flex fingers two through five
D) the flexor digitorum profundus can flex the fingers at the distal interphalangeal joint;the flexor digitorum superficialis cannot