a. create a
demand and supply graph for trenton university football tickets showing how the price ceiling of $15 is below the equilibrium price.

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.

answer; /// the above statement is ( true);