单选题 10.________ has been found to occur usually in children’s pronunciation or reporting of the truthfulness of utterances，rather than in the grammaticality of sentences． ( )
【正确答案】 C
【答案解析】本题主要考查儿童在学习语言的过程中，“强化(reinforcement)”是如何帮助他们更好地习得语言的。“强化(reinforcement)”的对象通常是发音和话语所指的真实性，而不是语法。