Question ID:PT34 S3 Q17 Passage:Zoologist:  Animals can certainly signal each other with sounds and gestures. However, this does not confirm the thesis that animals possess language, for it does not prove that animals possess the ability to use sounds or gestures to refer to concrete objects or abstract ideas. Stem:Which one of the following is an assumption on which the zoologist's argument depends? Correct Answer Choice:DChoice A:Animals do not have the cognitive capabilities to entertain abstract ideas. Choice B:If an animal's system of sounds or gestures is not a language, then that animal is unable to entertain abstract ideas. Choice C:When signaling each other with sounds or gestures, animals refer neither to concrete objects nor abstract ideas. Choice D:If a system of sounds or gestures contains no expressions referring to concrete objects or abstract ideas, then that system is not a language. Choice E:Some animals that possess a language can refer to both concrete objects and abstract ideas.