Identify the correct statements regarding administrative ideas:

A. Fred Riggs advocated the sala model of administration.

B. Abraham Maslow advanced the idea of hierarchy of needs.

C. Chester Barnard advanced the idea of Hawthorne effect.

D. Max Weber gave the idea of legal - rational authority.

E. Luther Gulick and Lyndall Urwick are associated with the concept of POSDCORB.

Choose the correct answer from the options given below: