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Amphibian occurance:

A) The LD-50 of Spotted Salamanders is less than that of Wood Frogs.
B) The chloride concentrations in ponds where the spotted salamander is absent are well below the LD-50 of the salamanders for chloride.
C) The chloride concentrations in ponds are above the LD-50 of all amphibians studied.
D) Claims A and B are supported by the data.
E) Claims A, B, and C are supported by the data.



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