题目解析:
disperse: 散开; 驱散, 对应 spread out 传播, 散布。The rural population both dispersed and grew, and was probably less homogeneous and more mobile than it had been a generation earlier.这里可以利用and的这个并列关系进行推测,disperse和grewin并列,所有在这些选项中,明显只有A最为合适,即”农村人口既扩散了,也增长了”。而B选项的gained power(获得权利),C选项的adapted(适应)和D选项的specialized(专门从事)代入后都不合适。