scientist is curious about the effects of diet on the gut length of spadefoot toad tadpoles.  She collects tadpoles from pools and dissects them to determine the length of their gut and their diet.   This study is…. Group of answer choices A. observational because she is not manipulating an independent variable B. possibly the most boring thing I have ever read C. experimental because she is doing it in the lab D. observational because she is doing it outside E. experimental because she is controlling the independent variable

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