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Skylar October 27, 2019
@CHLee Happy to help!First, I would recommend taking a few seconds to try to identify the flaw before proceeding to the answer choices. This can help to prevent you from spending time on misleading answer choices. Moreover, I would recommend always evaluating each answer choice if time allows or you're not positive you have found the correct one. The more familiar you become with these types of questions, the easier and faster identifying flaws will be for you.
Secondly, (B) should raise some red flags because of its conditional nature. (B) states that "a liquid CAN lose vitamins IF it stands...." The use of the words "can" and "if" show that this is not always the case. Therefore, it does not say anything concrete about the conclusion of the passage. If the tomato soup is not in contact with the air for a protracted period of time and therefore does not lose vitamins, then (B) has no effect on the passage. Be careful with answer choices that have a conditional nature.
Does that make sense? Please let us know if you have any other questions!