iii. If Olivia wants to learn a foreign language to get an idea of how satisfied other students were after taking a foreign language course she decided to take a random sample of 20 students. If...

Extracted text: iii. If Olivia wants to learn a foreign language to get an idea of how satisfied other students were after taking a foreign language course she decided to take a random sample of 20 students. If Olivia randomly select 5 students from French 5 from Germany 5 from Spanish and 5 from Chinese, the sampling method she used is a: A. Simple random sample B. stratified random sample C. Cluster sample D. None of these