Read the following text carefully, and then choose the correct answer from A, B, C or D to complete the sentence that follows.
Most doctors used to be sceptical about the validity of homoeopathy, acupuncture and other forms of complementary medicine. If patients wanted to receive this kind of non-conventional treatment, they used to have to consult private practitioners who were likely not to have medical degrees. However, in recent years, the perception of this type of treatment has changed.
