问题
单项选择题
What has changed the Nuclear Family in North America
A．People have changed their ideas about marriage.
B．Women become more independent.
C．The economy is changing.
D．All of the above factors are acting together.
答案
参考答案：D
解析：[分析] 主旨题型。 第四段和第五段探讨的都是导致核心家庭改变的因素，包括人们的婚姻观、妇女的独立和社会经济状况的改变。因而核心家庭的改变是以上因素的综合作用。