If you were to measure the distance from earth to saturn, would you use light-years or au? why?

I mean yeah, it's a lot easier to say the distance from Saturn to Earth is 9.5 AU then to say 1.2 billion kilometers.

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.

the answer your looking for is c. : )