Researchers wanted to know if there is a link between proximity to high-tension wires and the rate of leukemia in children. To conduct the study, researchers compared the rate of leukemia for children who lived within 1/2 mile of high-tension wires to the rate of leukemia for children who did not live within 1/2 mile of high-tension wires. The researchers found that the rate of leukemia for children near high-tension wires was higher than the rate for those not near high-tension wires. Can the researchers conclude that proximity with high-tension wires causes leukemia in children? (This is a reading assessment question. Be certain of your answer because you only get one attempt on this question.) OA. No, because this is an observational study. OB. No, because this is a designed experiment. OC. Yes, because this is a designed experiment, which allow for statements of causality. OD. Yes, because this is an observational studies, which allow for statements of causality.