A researcher designs an experiment to test a new memory medication. She received the names of 1,000 individuals willing to participate in her study. She plans to study 250 people. To reduce experimenter bias, what procedure must be used when choosing the participants? a
Deception

b
Naturalistic observation

c
Random assignment

d
Random sampling

e
Research accountability

I think it might be C.
But I am not 100% sure

Iwould suggest the myers-briggs type indicator because the railroad unions are looking for which are focused introverts. the mbti was designed to provide a lot of information about what a person likes and what their personality based on the four-dimension scale. also for an employer it has been extremely to predict how an employee would act in a professional setting. this is what the railroad unions are looking for. they want the railroad workers to be focused and skillful to ensure the safety of everyone around them. but the other assessments don't match the criteria for the unions. like the measure disorder, emotions and self-esteem while the rorschach and tat tests are both projective tests that mainly measure someone’s personality. also, because this job is not easy, it is vital to make sure the employers are hiring the right people for the job.