GMAT Critical Reasoning (CR) | Re: GMAT Critical Reasoning Assumption

this is terribly hard. but we have a magic weapon for all of cr problems. the weapon is to criticize the argument before going to answer choice ( for assumption, weaken, strengthen, flaw questions". if we do not criticize argument before going to answer choices, we die. though the situation you figure out in which the argument is invalid is different from the one in the answer choice, prethingking of criticization is alway valuable fatally.

we can paraphrase the argument as follow: only
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