单项选择题

The data accumulated was obtained through ______.

A．observation by social psychologists
B．conversations with motl3ers of the children
C．interviews, school records and physicians' 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

Evidence indicated that a high percentage of fathers were involved in the parenting process which amounted to ______.

A．about two-thirds of the fathers involved in the study
B．slightly less than half Of the fathers studied
C．more than three-quarters of all the fathers
D．a little less than one hundred percent of all fathers