单项选择题
下列是一段关于按摩特点的对话，请根据中文提示，选择合适的用语，补充对话。（）
——Chinese massage is accepted and has become more and more popolar in the world，why is so popular？
——Juse for it’s a______________________therapy.
A.safe，expensive，comfortable，harmful and non-side-effect therapy
B.safe，effective，comfortable，harmless and non-side-effect therapy
C.dangerous，effective，comfortable，harmless and non-side-effect therapy
D.safe，expensive，uncomfortable，harm and non-side-effect therapy