单项选择题

The data accumulated was obtained through

A．observation by social psychologists.
B．conversations with mothers of the children.
C．interviews, school records and physician' reports.
D．observations of fathers with their children.

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单项选择题

According to the passage, children who tended to generally progress academically were

A．those whose mothers gave them the most affection.
B．those whose fathers worked the night shift.
C．those who had no brothers or sisters.
D．from one-parent families.

单项选择题

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.