Some Researchers Have Attempted to Revive Components of the Need

Some researchers have attempted to revive components of the need hierarchy concept, using principles from evolutionary psychology. Which of the following statements is true in this regard?

A) Researchers propose that higher-level needs are the chief concern of immature animals or those with primitive nervous systems.
B) Researchers observe that lower needs are more frequently observed in mature animals with more developed nervous systems.
C) Researchers have noted distinct underlying biological systems for different types of needs.
D) Researchers observe that in time, these revisions to Maslow's hierarchy will definitely be useful to practicing managers.
E) Researchers have noted the presence of intricate social systems for different types of needs.