Every morning, Lucia sets out bird feeders filled with sunflower seeds. Within minutes, cardinals and sparrows arrive, and by noon the feeders are empty. She refills them each evening. Question: What can most reasonably be concluded about the birds in Lucia's yard?
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A
The birds have learned that Lucia's yard is a reliable food source.
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B
The birds prefer sunflower seeds to all other foods.
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C
Lucia's yard has no predators that frighten the birds away.
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D
The birds migrate south for winter each year.