A car manufacturer claims an enginerring breakthrough, since it successfully reduced its interior noise level from 65dB to 55 dB. What might be a proper reaction? 单项选择题

A

A 10 dB reduction? That's just a 10% reduction in noise intensity.

B

Yes, that's quite remarkable --- they cut the intensity of the noise by 90%!

C

That's not much; the intensity of the noise only dropped by a factor of 10/65, or about 15%.

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