The population between the age of 25 and 44 increased by 28.1% from 1980 to 1989 because ___________.
A、this was the period of large inflow of young immigrants
B、this was the birth age of the baby boomers.
C、the large number born during WW II reached this age bracket
D、those who were born in the period of baby boom reached this age bracket
【正确答案】:D
【题目解析】:本题考查美国的人口增长。根据课本P187可知,从1980年到1989年,25岁到44岁的人口增长了28.1%,因为那些出生在婴儿潮时期的人达到了这个年龄段。