A farmer has 20 acres of land on which he grows corn and wishes to conduct a random sample to evaluate the quality of the corn. He knows the soil that is 10 acres to the right of the center is poor relative to the other 10 acres to the left of the center. He decides to randomly select more com from the region right of the center than the left. This method of sampling is: Simple random sampling Cluster sampling Stratified sampling All of the above None of the above 9);;pr