Which one of the following, if true, would most seriously weaken the proponents' argument regarding the safety of usi...

Jingwenbb May 17, 2020

The answer is wrong

The right answer should be D but it shows A here

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Jingwenbb May 17, 2020

Sorry I got wrong question

shunhe May 18, 2020

No worries, glad you figured it out!