2021年抚顺市中考录取分数线，将于7月中下旬公布！请考生家长注意收藏 

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Why does the writer first mention the 30,000­year­old animals' skulls?

A．To show that dogs were much larger in the past.

B．To prove that dogs developed from Asian wolves.

C．To suggest that dogs may have evolved much earlier.

D．To argue that dogs were first kept in France and Belgium.

推理判断题。根据第二段第三句“However,30,000­year­old skulls have been discovered in France and Belgium that are not pure wolves' and some scientists think could be dogs'.”可知，在法国和比利时已经发现了3万年前的头骨，它们不完全是狼的，科学家认为有一些可能是狗的。据此可推知，该处提及三万年前的头骨旨在说明狗的进化历史也许更早，故C项正确。