According to the passage，most farmers’ debts had to be paid______.
A. when the autumn harvest had just been completed
B. because wheat prices were high
C. as soon as the Winnipeg Grain Exchange demanded payment
D. when crop failure caused depression
正确答案：A
[解析]见第二段第四五行事情经常是农民在收获后卖掉小麦农场债务也随之到期
