题目内容
（请给出正确答案）
[主观题]
The author uses the example of a rattle to show that ______.A．in toy - making there is a c
The author uses the example of a rattle to show that ______.
A．in toy - making there is a continuity in the use of materials
B．it often takes a long time to introduce new technology into toy -making
C．even the simplest toys can reflect the progress of technology
D．even a simple toy can mirror the artistic tastes of the time
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