Which minerals have been proved to be insufficient? Which of the following can be concluded from this passage?

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问题 Which minerals have been proved to be insufficient?
Which of the following can be concluded from this passage?

选项 A、China’s gold and silver reserves are among the largest in the world.
B、China’s reserves of minerals are among the largest in the world.
C、The development of science and technology will guarantee the discovery of more minerals.
D、The prospects for more minerals are gloomy.

答案C

解析
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