题目选项分析

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?

【选项】Neither thorough cooking nor irradiation treatment can kill all of the bacteriapresent in some meats.