Researchers found that children's academic achievements grow in correlation with their parents' income. Some researchers have attributed this trend to the correlation between parents' income and the extent of their education, which means that high-income families can also provide better academic support; however, other researchers have attributed it to the ability to invest larger amounts of money in better educational assistance.
Which of the following, if true, would support one of the two hypotheses and undermine the other?
A. Children who have higher academic achievements at school earn more money when they grow up.
B. Doctors have high income, but they rarely see their children.
C. For university students of economics, the higher their grades, the more expensive their tuition.
D. In after-school academic enrichment courses, children from low-income families achieve more than do other children.
E. Children with better achievements help improve their parents' education.
According to the source B is the right choice as it undermines one hypothesis, but in my opinion it does not necessarily support the other hypothesis.