One Crucial Conclusion a Historical Study of Motivation Teaches Us

Multiple Choice

One crucial conclusion a historical study of motivation teaches us is that:

A) human motivation is too complex to understand.
B) motivation study is most successful when it focuses on building and validating grand theories of motivation.
C) the forces that direct behavior are as important as the forces that energize it.
D) we should limit our contemporary study to the instigators of behavior.