In his book walden ii, b. f. skinner described children who were able to resist eating lollipops even when exposed to them for long periods of time. modern researchers might conclude these children had high levels of intelligence.

answer; (d) none of the above;

its a hope it good luck

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.