A-A+
A chief factor in bringing down the births in
问题详情
A chief factor in bringing down the births in Europe in the 19th century is ______.
A．birth control
B．the desire to seek fortune in cities
C．the instability of marriage
D．the changed place of women
参考答案
正确答案：B
解析：参看第三段最后一句，the main factor与ambition to rise in the urban world是同位语，即是19世纪欧洲出生率下降的主要原因。
