# 题目内容

It can be inferred from the passage that if Keays proposed explanation of meteor sounds is correct, it is true that
• Ameteors themselves produce no audible vibrations, even though the meteor does cause the sounds that observers hear
• Bwhen an observer hears the sounds, it is his or her own hair that is causing the audible vibrations
• Cif two observers in widely separated locations hear sounds caused by the same meteor, the audible vibrations that reach the observers are produced by different objects
• Dvisible light and VLF radio waves are the only forms of electromagnetic radiation that are given off by a meteors trail
• Eatmospheric conditions, such as clouds, that made a meteor invisible to observers on the ground would also prevent those observers from hearing any sounds caused by that meteor

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