THIS question: 2 point(s) possible Submit test In a large city school system with 21 elementary schools, the school board is considering the adoption of a new policy that would require elementary students to pass a test in order to be promoted to the next grade. The PTA wants to find out whether parents agree with this plan. Listed below are some of the ideas proposed for gathering data. For parts a through d indicate what kind of sampling strategy is involved and what (if any) biases might result. Assume the schools are homogeneous and differ from each other. a) Send a survey home with every student, and ask parents to fill it out and return it the next day. Which kind of sampling strategy is involved? OA. An attempt at a census OB. Systematic sampling OC. Convenience sampling OD. A simple random sample What kind of bias (if any) is most likely to result? OA. Response bias could result since the PTA wants parents to agree to this plan. OB. Undercoverage bias could result since only parents involved with the PTA will be sampled.