With no explanation, label text_A→text_B with either "no" or "yes".
text_A: For areas with low cigarette tax, the probability of normal infant birth weight is 66%. For areas with high cigarette tax, the probability of normal infant birth weight is 79%. For areas with low cigarette tax, the probability of smoking mother is 18%. For areas with high cigarette tax, the probability of smoking mother is 56%.
text_B: Will smoking mother increase the chance of normal infant birth weight?
yes.