Must Be True—SN. The correct answer choice is (D)
This stimulus presents several conditional statements regarding a certain store's policy concerning sales:
At all times there is either a managers sale, or a holiday sale, or both:
- no manager's sale → holiday sale
no holiday sale → manager sale
If a manager wishes to clear out a line of merchandise, they have a manager's sale:
- manager wishes to clear → manager's sale
and → holiday sale
In August, there is no holiday and no excess:
- no holiday
August → and
The question stem is a Must Be True, so the right answer choice should be confirmed by the conditional statements above.
Answer choice (A): This answer choice is not supported by the passage; all we can say is that if there is excess in any holiday month, there will be a holiday sale. If there is no excess, we have no information on what the store will do.
Answer choice (B): This incorrect answer choice is unsupported by the stimulus, as there may be other months without holidays, and other holiday months without excess.
Answer choice (C): We know that this is unsupported; there could still be excess merchandise, and there could still be a concurrent holiday sale as well.
Answer choice (D): This is the correct answer choice, confirmed by the first conditional rule presented in the stimulus: there is always either a managers sale, or a holiday sale, or both.
Answer choice (E): This is a mistaken negation of a portion of the final conditional rule. According to the stimulus, if it is August there is no excess: August → no excess
This choice incorrectly asserts a mistaken reversal: no excess → August