You design an experimental rat study to test whether a water toxicant increases the chances of cancer development. You have three groups of rats: control (water only), low toxicant concentration, high toxicant concentration. You expose the rats for two years before measuring molecules in their organs. Given this information, which of Hill’s Causal Considerations does this experiment address? You can choose more than one.多项选择题

A

Biological Gradient

B

Consistency

C

Temporality

D

Plausibility

E

Experiment

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