Which of the following, if true, would most weaken Brown's conclusion? A. The oyster gradually closed their shells after high tide in Illinois had passed. B. The oysters' behavioral rhythms maintained their adaptation to the tide schedule in Illinois throughout thirty days of observation. C. Sixteen days after they were moved to Illinois, the oysters opened their shells widest when it was high tide in Connecticut. D. A scientist who brought Maryland oysters to Maine found that the oysters opened their shells widest when it was high tide in Maine. E. In an experiment similar to Brown's, a scientist was able to establish a clear causal relationship between environmental change and behavioral rhythms.