Which of the Following Statements Is False

Which of the following statements is false?

A) Since 1950, farm population and the number of active farms have fallen, but average farm size (in acres) has risen.
B) The output of American farms is largely accounted for by small and medium-sized farms.
C) More than half of all American farms have total sales of less than $30,000.
D) Agricultural productivity rose during the twentieth century.