Treating meat with irradiation kills many bacteria that can cause illness but it also triggers chemical decompositions. These decompositions produce substances that can cause cancer. Thorough cooking kills the same bacteria in meat as does irradiation treatment. Therefore, to minimize health risks, meat should be cooked thoroughly rather than treated with irradiation.
Which of the following, if true, most seriously weakens the argument above?
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ANeither thorough cooking nor irradiation treatment can kill all of the bacteriapresent in some meats.
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BSince radiation was first used to treat meat, the amount of irradiation required forthe process has been greatly reduced.
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CNot all of the substances produced by the chemical decompositions triggered by irradiation are potentially carcinogenic.
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DSome of the bacteria that are found in cooked meat are beneficial to digestiveprocesses in humans.
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EThoroughly cooked, unirradiated meat contains potentially carcinogenic substances identical to those found in meat treated with radiation.
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正确答案: E