When driving up a steep incline, you should to maintain a constant speed.

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;

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; sutherland-differential association;