Which of the following best describes Theory Y?
A. a theory of motivation describing five levels of human needs and arguing that basic needs must be fulfilled before people work to satisfy higher-level needs

B. a theory of motivation holding that people are naturally responsible, growth oriented, self-motivated, and interested in being productive

C. a theory of motivation holding that people are naturally irresponsible and uncooperative

D. a theory of motivation holding that job satisfaction depends on two types of factors, hygiene and motivation