[单选]灵长目动物随着群体规模的扩大．需要处理的信息量也大得令人头疼。在一个有五位成员的群体中，成员间共有十组双边关系；在20个成员的团体中，双边关系数量上升到190组；50个成员的团体则升至1225组。________。大脑皮层越大，它们所能应付的群体规模也就越大。与此同时，即便是最聪明的灵长目动物——人类，也不具备在一个无限大的群体中的处理能力。填入划横线部分最恰当的一句是：
A．这样的社交生活需要强大的大脑
B．族群成员的相处并非易事
C．人类群体的规模上限取决于大脑皮层
D．双边关系数量的激增促进了大脑的进化

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In Sports, Red Is the Winning Color When opponents of a game are equally matched, the team dressed in red is more likely to win, according to a new study. British anthropologists Russell Hill and Robert Barton of the University of Durham reached that conclusion by studying the outcomes of boxing, tae kwon do, Greco-Roman wrestling (摔跤),and freestyle wrestling matches at the 2004 Summer Olympics in Athens, Greece. In each event, Olympic staff randomly assigned red or blue clothing or body protection to competitors. When competitors were equally matched with their opponent in fitness and skill, the athletes wearing red were more likely to win. "Where there was a large point difference — presumably because one athlete was far superior to the other — color had no effect on the outcome," Barton said. "Where there was a small point difference, the effect of color was sufficient to tip the balance.” Joanna Setchell, a primate (灵长目)researcher at the University of Cambridge in England, has found similar results in nature. Her work with the large African monkeys known as mandrills shows that red coloration gives males an advantage when it comes to mating. The finding that red also has an advantage in human sporting events does not surprise her, and she adds that "the idea of the study is very clever." Hill and Barton got the idea for their study from a mutual interest in primates — "red seems to be the color, across species, that signals male dominance," Barton said. For example, studies by Setchell, the Cambridge primate researcher, show that dominant male mandrills have increased red coloration in their faces and rumps (臀部). In another study, scientists put red plastic rings on the legs of male zebra finches (斑胸草雀), which increased the birds’ success in finding a mate. Barton said he and Hill speculated that "there might be a similar effect in humans.” Hill and Barton found their answer by viewing Olympic competitors in the ring, on the mat, and in the field. "Across a range of sports, we find that wearing red is consistently associated with a higher probability of winning, the researchers write. Barton adds that this discovery of red’s advantage might lead to new regulations on sports uniforms. In the Olympic matches he studied, for example, it is possible that some medal winners may have had an unintended advantage — their clothing!Many athletes oppose the new regulations on sports uniforms.
A. RightB. WrongC. Not mentioned
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“从你那里得到的信息让我明白必须重新考虑先前的谈判立场。”上述行为体现了放弃威胁技巧，（）。

A.让威胁自然销声匿迹B.以更为委婉的方式来重申威胁C.做到不损伤己方的尊严以及双边关系D.谈判者可以重新表态并暗示背景已经改变
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