【单选题】

The primary purpose of the passage is to ______.
A．describe the events that led to the passage of the Agricultural Adjustment Act of 1938

B．call attention to the economic hardship suffered by farmers during the 1930s
C．discuss the reasoning that led the Supreme Court to declare the Agricultural Adjustment Act of 1933 unconstitutional
D．analyze the connection between changes in weather conditions and the movement of agricultural prices