This is a tricky assumption question that really tests your ability to identify what
must be true for an argument to work. Let me walk you through the core reasoning that unlocks this problem.
Understanding the Argument's MechanismThe argument concludes that when retailers keep selling prices constant but use higher reference prices, consumers will perceive better deals. But notice what this conclusion
depends on - it assumes consumers actually use these reference prices in their mental calculations.
Think about it this way: if you completely ignored or distrusted the reference prices that retailers show you, would higher reference prices make any difference in how good you think the deal is? Of course not!
The Critical GapHere's what you need to see: the argument jumps from "retailers show reference prices" to "higher reference prices create better deal perception." But this only works if consumers find these reference prices credible enough to use them as comparison points.
Why Answer Choice D WorksChoice D states that "Consumers perceive most suggested reference prices in retailers' advertising to be sufficiently credible as a guide to transaction value."
This is exactly what the argument needs to assume. If consumers viewed reference prices as completely fake or unreliable, the entire mechanism breaks down. The psychological comparison effect only works when people trust the reference point enough to use it in their decision-making.
Why the Other Choices Don't WorkChoice A goes too far by claiming acquisition value has
no effect - the argument doesn't need this extreme claim.
Choice C might seem logical, but whether people actually pay reference prices doesn't matter - what matters is that they use them for comparison.
Choice E makes a comparative claim about importance that the argument doesn't require.
The key insight here is distinguishing between what would
strengthen an argument versus what the argument
must assume to be true.
You can check out the
complete systematic framework for assumption questions on Neuron, where you'll discover the 4-step method that works across all assumption question types, plus common trap patterns to avoid. You can also practice with
comprehensive solutions for similar official questions here to build consistent accuracy in Critical Reasoning.