With no explanation, label text_A→text_B with either "no" or "yes".
text_A: For students who are not encouraged and do not study hard, the probability of brown eyes is 76%. For students who are not encouraged and study hard, the probability of brown eyes is 35%. For students who are encouraged and do not study hard, the probability of brown eyes is 49%. For students who are encouraged and study hard, the probability of brown eyes is 4%. For students who are not encouraged, the probability of studying hard is 62%. For students who are encouraged, the probability of studying hard is 2%.
text_B: Does encouragement level positively affect brown eyes through studying habit?
yes.