【正确答案】
A
【答案解析】[听力原文] The number of girls married in Africa is expected to double in the next 35 years, experts say. That means almost half, or 310 million girls, by 2050 will be married before they reach adulthood, says a United Nations report. The African Union says it wants to end child marriage in Africa. Delegates at a summit in Zambia are expected to set 18 years old as the lowest legal age for marriage across the continent. Marriage before age 18 is already against the law in most African countries. Yet the UN says more than 125 million African women and girls alive today were married before their 18th birthday. Experts say most were given to men in traditional or religious unions in violation of the law. African Union chairwoman Nkosozana Dlamini Zuma says local culture that undervalues girls and women is to blame. Poverty and lack of education are also responsible, experts say. Cornelius Williams is associate director of child protection at UNICEF. He says the best way to prevent child marriage is to enforce and improve educational options for girls. That will change opinions about the role of girls in society. How many got married before 18 nowadays among living African women and girls? 新闻中的主题就是非洲的童婚问题，其中提到，现在有超过1.25亿非洲在世妇女和女孩的结婚年龄都早于18岁，而到2050年会有近半数（约3.1亿女孩）将在成年之前就结婚，因此这两组数字需区分清楚，排除C，正确选项是A。