I would think it is A. Yoga. But if that is wrong then go with Tai chi. With yoga you have to be precise with the certain move you are doing. But that is also implied to Tai chi.
I do not know why they would put two in there that can be the correct answers.
Tar in cigarette smoke paralyzes the cilia in the lungs and contributes to lung diseases such as emphysema, chronic bronchitis, and lung cancer. The concentration of tar in a cigarette determines its rating. does this help???
