A. people being better educated
B. people getting married earlier
C. better standards of living
D. couples buying houses
B
Đáp án B Từ dòng 3,4 đoạn 2: Young people were staying at school longer; more women were working; young married couples were buying automobiles or houses before starting families; rising living standards were cutting down the size of families. -> Chỉ có đáp án B không được đề cập
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