What Is the Main Reason Why Experiments in Psychology Don't

Multiple Choice

What is the main reason why experiments in psychology don't usually involve the entire population of interest?

A) It is impractical to study the entire population.
B) Researchers often have difficulty defining their population.
C) Statistical methods only deal with samples and are not equipped to analyze data from entire populations.
D) Since statistical methods allow us to draw inferences about a population from our sample, it is unethical to study the entire population.