TOEFL Listening: TPO-TOEFL阅读TPO - XZ45F5QSBF9P5N4AN$

What can be inferred from paragraph 6 about the role of adults in play activities of the young? A. Adults help their young learn to become dominant within the social group. B. Young animals learn how to play from the adults within their social group. C. Adults allow the young to engage in play behaviors within a protected, sage environment. D. The long developmental period of some animals allows adults more time to teach their young how to deal with the threats of predators.