Popular singing competition The Voice of China has denied misleading viewers after some noticed the hairstyle of one of the judges changed while she was commenting on a performance. Na Ying's hair at first appeared curly but changed to straight after 16 seconds and then turned curly again after a further 30 seconds. The change aroused suspicion that the show was directed according to a script rather than singers' real performances.

How many times did the judge's hairstyle change?

A. 1

B. 2

C. 3

（中國日報網英語點津 Helen 編輯）