The annual population growth rate of the 1990s was ______.

The annual population growth rate of the 1990s was ______.
A、1%
B、0.9%
C、over 1%
D、under 1%
【正确答案】：C
【题目解析】：本题考查美国20世纪的人口增长率。根据课本P185 The American Population almost quadrupled during the 20th century—at a growth rate of about 1.3%可知，美国二十世纪人口增长率是1.3%。