In the United States of America,the average age for a first marriage has increased by ____ years since 1960,when the average age was 23 for men and 21 for women.
A) 2
B) 4
C) 6
D) 8

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The Answer of In the United States of America,the average age for a first marriage has increased by ____ years since 1960,when the average age was 23 for men and 21 for women.
A) 2
B) 4
C) 6
D) 8

In the United States of America,the Average Age for a First