How have most data on environmental hazards been obtained? Select all that apply
A. Data obtained after large amounts of toxic chemicals were accidentally released.
B. From descriptive research done by occupational health physicians.
C. Research using random clinical trials in a controlled laboratory setting.
D. Systematically using government-obtained data from required state reports.
E. Toxicologists examining the effects of chemicals on animals and assuming humans may be similarly affected.
F. When occupational exposure is correlated with health problems later.
ANS: A, E, F
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