While Sitting at Your Desk, You Drop Your Pencil onto the Floor.You

Multiple Choice

While sitting at your desk, you drop your pencil onto the floor.You bend over to pick up the pencil.In order to straighten up and continue your exam you must use which of the following muscles?

A) tibialis anterior
B) erector spinae
C) semimembranosus
D) tibialis anterior and semimembranosus
E) extensor hallucis longus