Sale Analyst: When polled, all consumers consistently say that, for household staples, they would buy the lowest cost items. Even when other factors, such as inherent product quality, are introduce, all consumers still argue that low cost should be the highest priority in buying household staples. Therefore, these responses demonstrate how little most people are aware of the actual priorities that drive their purchasing decisions.
The conclusion above is properly drawn if which of the following is assumed?
(A) Many people on restricted incomes are not able to afford any brands of household staples more expensive than the lowest cost items.
(B) Consumers do not always have the motivation to be truthful about their real motivations when responding to a stranger giving a poll.
(C) Often, higher priced brands of household staples, especially organic versions, are more nutritious and are rated better-tasting in double-blind tests.
(D) People often give unreliable and self-contradictory explanations after the impulse purchase of a snack or dessert.
(E) For many household staples, famous name brands with recognizable ads consistently outsell less expensive brands of the same products.
Of course, it's very important to understand Assumptions and the Negation Test for the GMAT CR questions. For three other challenging GMAT CR practice questions involving assumptions, as well as the OA & OE for this particular question, see:
https://magoosh.com/gmat/2016/gmat-criti ... questions/