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Herbal tea has become a popular product and is offered by a number of brands. An investigation showed that out of the 7 brands of tea sold at an average-sized supermarket, all included preservatives and added chemicals for flavor and color. It can be stated, therefore, that in order to drink a truly healthy herbal tea, the ingredients should be collected from a natural source.
Which of the following, if true, supports the argument's conclusion?
This answer choice neither weakens nor strengthens the conclusion. Why herbal teas became popular is not relevant to our task since it does not support the author's conclusion.
This answer choice weakens the conclusion, by showing that seeking truly healthy herbal tea outside of average-size supermarkets is pointless; these supermarkets already offer the best products consumers are looking for.
This answer choice neither weakens nor strengthens the conclusion. What Some people may do is not relevant to our task since it does not support the author's conclusion.
This answer choice could be considered to be weakening the conclusion by showing that even some of the natural sources for herbal tea leaves (farms) are not necessarily chemical-free.
This answer choice strengthens the author's conclusion by making two points:
1. It mentions that the chemicals in the branded tea disrupt digestion.
2. It claims that herbs grown with water alone do not contain such chemicals.