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Inference 11

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The Thief in the Mirror, Frans B. M de Waal

De Waal, Frans B. M. "The Thief in the Mirror." PLOS Biology (2008): n. pag. Journals.plos.org. Web. 20 Mar. 2016.

According to the article, the magpie belongs to a small group of __________ who have achieved MSR. Which of the following terms best completes the sentence?

A

mammals.

B

animals.

C

birds.

D

corvidae.