En when we choose positive beliefs, these lead to positive behaviors. positive behaviors often lead to positive results that reinforce our positive beliefs, and the cycle begins anew. this sequence describes the cycle of

This sequence describes the cycle of "success".

Cycle of Success is the possibility that libraries, personnel, and understudies are connected; for one to really succeed, we should all succeed. The way to progress is framed by the associations between University of Missouri Libraries and employees, between employees and understudies, and among understudies and the libraries that serve them. Something beyond progress, this is additionally an association of shared regard, support, and promise to forward-thinking research.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

it should be d or b but i'm sure it's d