A-A+
A．New banking laws made it easier to buy farml
问题详情
A．New banking laws made it easier to buy farmland.
B．The United States increased its agricultural imports.
C．Crop production became increasingly specialized.
D．Economic depressions lowered the prices of farm products.
参考答案
正确答案：C
解析：选项都和细节有关。从But by the mid-century, sweeping changes in agriculture were well underway as farmers began to specialize in the raising of crops such as cotton or corn or wheat．可以得知C是主要的变化。
