This response indicates application of a reasonable strategy that leads to a correct solution in the context of the problem. The student correctly chooses Method C as providing a simple random sample and gives a fully developed justification (everyone will have an equally likely chance to be chosen to survey and each student will be chosen independently). The justification for why Method A will not provide a simple random sample is correct (a student may not be able to get to the cafeteria that day or may be absent. So the students do not have an equally likely chance to be chosen). A correct justification is also given for why Method B will not provide a simple random sample (only the eleventh grade students get to be offered to be surveyed and 9th and 10th graders won't get a chance to say their oppinion). The response demonstrates a complete understanding and analysis of the problem.
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