PrepTest 50, Section 3, Question 18
It was once thought that pesticide TSX-400 was extremely harmful to the environment but that pesticides Envirochem and Zanar were environmentally harmless. TSX-400 was banned; Envirochem and Zanar were not. However, according to recent studies, Envirochem and Zanar each cause greater environmental harm than does TSX-400. If these studies are accurate, then either Envirochem and Zanar should be banned or TSX-400 should be legalized.
It was once thought that pesticide TSX-400 was extremely harmful to the environment but that pesticides Envirochem and Zanar were environmentally harmless. TSX-400 was banned; Envirochem and Zanar were not. However, according to recent studies, Envirochem and Zanar each cause greater environmental harm than does TSX-400. If these studies are accurate, then either Envirochem and Zanar should be banned or TSX-400 should be legalized.
It was once thought that pesticide TSX-400 was extremely harmful to the environment but that pesticides Envirochem and Zanar were environmentally harmless. TSX-400 was banned; Envirochem and Zanar were not. However, according to recent studies, Envirochem and Zanar each cause greater environmental harm than does TSX-400. If these studies are accurate, then either Envirochem and Zanar should be banned or TSX-400 should be legalized.
It was once thought that pesticide TSX-400 was extremely harmful to the environment but that pesticides Envirochem and Zanar were environmentally harmless. TSX-400 was banned; Envirochem and Zanar were not. However, according to recent studies, Envirochem and Zanar each cause greater environmental harm than does TSX-400. If these studies are accurate, then either Envirochem and Zanar should be banned or TSX-400 should be legalized.
Which one of the following principles, if valid, most helps to justify the argumentation?
Two pesticides should not both be legal if one is measurably more harmful to the environment than the other is.
Two pesticides should both be legal only if neither is harmful to the environment.
Two pesticides should both be illegal only if both are harmful to the environment.
One pesticide should be legal and another illegal only if the former is less harmful to the environment than is the latter.
One pesticide should be legal and another illegal if the former is harmless to the environment and the latter is harmful to it.
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