- ASale items cannot be returned; the assistant said so before the customer paid, and a notice to that effect hung above the counter
- BSale items cannot be returned; a notice to that effect hung above the counter, but nobody mentioned the condition to the customer before she paid
- CSale items cannot be returned; the assistant said so before the customer paid, and the same words were printed on a card standing on the counter
- DSale items cannot be returned; the assistant said so before the customer paid and pointed to the written condition on the counter, which the customer then read
Step-by-Step Solution
The principle demands two things together: a spoken warning before payment and a written display. In the correct case only the written half is present, so the shop falls short and cannot refuse. Each of the other three has both halves — spoken warning plus a notice, a printed card or a written condition pointed out — and so satisfies the principle.
Answer: B) Sale items cannot be returned; a notice to that effect hung above the counter, but nobody mentioned the condition to the customer before she paid