What is the name for any country that provides extensive social services at little or no direct cost to consumers?
a. a welfare state
b. a socialist state
c. a communist state
d. a collective state

answer: intercourse

hope this

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.