Steven identifies with the Republican party and usually votes for Republican candidates. His participation would be considered part of which group

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.

i think it is the third one.

the values of the selma marchers was to bring   their ability to vote into law. mlk was not hat march, which was protesting toward lbj