Which of the Following Participant Samples Would Most Likely Generalize

Multiple Choice

Which of the following participant samples would most likely generalize to the population of teenage American girls?

A) 75 girls aged 13-18, randomly sampled from multiple sites across the country
B) All 500 of the girls at a single high school
C) 200 girls recruited from Girl Scout troops across the country
D) 50 after-school female volunteers who were available to participate in the research easily