D is right because the stimulus says that there is either a Manager's sale or a Holiday sale or both going on at all times. Since that is the case, then it must be true that there is a Holiday sale being run in a month that doesn't have a Manager's sale, since at least one of those two sales has to be happening at all times.
E is wrong because while it's true that there is never any excess merchandise in the warehouse in August, that doesn't mean that August is the only month where the warehouse never has excess merchandise. There could be several other months where there isn't excess merchandise in the warehouse too.
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Hello,
D is right because the stimulus says that there is either a Manager's sale or a Holiday sale or both going on at all times. Since that is the case, then it must be true that there is a Holiday sale being run in a month that doesn't have a Manager's sale, since at least one of those two sales has to be happening at all times.
E is wrong because while it's true that there is never any excess merchandise in the warehouse in August, that doesn't mean that August is the only month where the warehouse never has excess merchandise. There could be several other months where there isn't excess merchandise in the warehouse too.