When approaching a crosswalk where a blind pedestrian is waiting to cross, you must stop: O At the crosswalk and wait for the pedestrian to cross the street.
O More than five feet from the crosswalk so the pedestrian will not be distracted by the sound of your engine_
O At the crosswalk and then tell the pedestrian when to cross the street.

When approaching a crosswalk where a blind pedestrian is waiting to cross, you must stop: More than five feet from the crosswalk so the pedestrian will not be distracted by the sound of your engine. At the crosswalk and wait for the pedestrian to cross the street.

forty niners migrated west due to gold discovery in california and it the west was a new place for hope this : )

explanation:

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.