请教OG11逻辑Weaken题

OG11（12-）--Cable-televison spokesperson: Subscriptions to cable television are a bargin in comparasion to "free"television.Rember that "free television is not really" free". It is consumers,in the end,who pay for the costly adverstising that supports"free" television. 问削弱这个 spokesperson, 这个题目是按照因果型结论，条件结论或其他的方式考虑，这题的前提和结论是什么？

OG11（48）-- Some anthropologists study modern-day societies of foragers in an effort to learn anout our ancient ancestors who were also foragers. A flwa in this strategy is that foragers societies are extremely vaied. Indeed, any forager society with which anthropologists are familiar has had considerable contact with modern,non-forager societies. 问削弱这个 anthropologists的战略, 这个题目是按照因果型结论，条件结论或其他的方式考虑，这题的前提和结论是什么？

(64) Red blood cellls in which the malarial-fever parasie resides are eliminated from a persom's body after 120 days. Because th parasite cannot travel to a new generation of red blood cells, any fever that develops in a person more than 120 days after that person has moved to a malaria-free region is not due to the malarial parasite. 削弱结论，请问怎么考虑 ?

(65) Most consumers do not get much out of the sports equipment they purchase. For example, 17%of the adults in the US own jogging shoes,but only 45%of the owners jog more than once a year, and only 17% jog more than once a week.请问削弱 选项 Consumers who take up jogging often ourchase athletic shoese that can be used in other sports 为何错？

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