单选题 The main discovery made in the study was that

A、 children in large families tend to do poorly in school.
B、 a father's influence played a significant factor in the level of the child's academic progress.
C、 mothers were subjective in evaluating the roles played by fathers.
D、 there is a correlation between socioeconomic status and scholastic achievement.

【正确答案】 B

【答案解析】[解析] 本题考查主旨大意。从文章第一段最后一句“As a matter of fact，‘life with father’has been discovered to be a very important factor in determining a child's progress or lack of progress in school．”可知：父亲的影响是决定孩子学业进步的一个重要因素。[A]是对文中所引用具体事例的归纳总结；[C]是对最后一句的归纳；[D]在原文中没有提及。