While examining the problem-solving abilities of red foxes (Vulpes vulpes), researchers failed to account for the varying degrees of physical effort required by the tasks provided to test the foxes. The problem-solving abilities of foxes tasked with limited physical prowess, such as opening a box to find food, were evaluated by the same standards as those of foxes that were given physically challenging tasks, like digging a deep hole to retrieve a treat. Consequently, the findings of the study ______
Which choice most logically completes the text?
15/27
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