For the hierarchy of skeletal muscle organization,which accurately lists the order of structures from "small" to "big"?

A)sarcomere,myofibril,muscle fiber,motor unit
B)myofibril,muscle fiber,sarcomere,motor unit
C)motor unit,myofibril,muscle fiber,sarcomere
D)motor unit,sarcomere,muscle fiber,myofibril
E)None of the choices are correct.