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The paragraph explores the sunk-cost fallacy and its usual applicability when the decision-maker has made the original investment. The blank introduces a contrasting idea, suggesting that this assumption is incorrect. Option 1 fits perfectly as it introduces a study that challenges the conventional understanding of the fallacy, creating a logical flow from the paragraph to the new insight. Option 2 discusses long-term applicability, but the paragraph seeks to contrast, not Option 3 proposes a possible explanation but fails to logically follow the blank that demands a contrast. Option 4 overgeneralises the phenomenon without providing the necessary contrasting evidence.
The average of five consecutive odd numbers is 45. What is the average of the first three numbers among them?