What claim is made about the Olassen Wireless Telephone Headset? A.It fits comfortably on any adult. B.It works with any wireless telephonE. C.It was originally developed for the music industry. D.It produces better sound than face-to-face conversation.
A.It B. B.It C. C.It D. D.It
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D 解析：第二段最后一句话The result is an enhanced signal that sound......