Question

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

Answer 1

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