又有两道题目不明白：大全56-04和06

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4。A third theory, proposed by Wynne-Edwards and termed “epideictic,” argues that organisms have evolved a “code” in the form of social or epideictic behavior displays, such as winter-roosting aggregations or group vocalizing; such codes provide organisms with information on population size in a region so that they can, if necessary, exercise reproductive restraint.

6。However, Wynne-Edwards’ theory, linking animal social behavior and population control, has been challenged, with some justification, by several studies.

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第6题，是续写文章类型的题目，一般是需要根据最后一句话的内容。只有C才符合。D没有反对Wynne-Edwards’ theory，所以不对。