(单选题)

Why did the prices of soybean rise according to the passage? ( )

A.cause the general production of soybean stayed steady
B. Because the supplies were expected to keep tight

B.Because China’s demand for soybean increased

C.Because the trade of soybean was quite active

参考答案：C

参考解析：

细节题。根据文段第三段第一句“Supplies for beans have been extraordinarily tight as China’s demand for soymeal continues to increase”我们可以知道在美国整体产量相对稳定的状态下，中国对大豆的需求增加。因此导致价格上升。A项就是产量保持稳定需求上升，供不应求，价格才涨的。B项文段中只是提到大豆的出口会增加，但没有提到会紧缩。D文段当中未提及。因此答案选C。

知识点：细节题英语阅读理解通用英语