【문11】다음 글에서 전체 흐름과 관계 없는 문장은?
It is generally believed that primates first appeared on Earth approximately 80 million years ago. Unlike reptiles, they were very sociable animals, creating a large community. ① One of the many ways in which the primates built a network of social support was grooming. ② In most cases, primates have visible folds that they would not have if they had, even lightly, groomed the area. ③ For instance, apes spent a large amount of time grooming each other. ④ Interestingly, in the case of Barbary macaques, the giving of grooming resulted in more stress relief than the receiving of grooming.
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