All of the Following Statements About Intensive Subsistence Agriculture Are

All of the following statements about intensive subsistence agriculture are true EXCEPT that it

A) involves total concentration upon a single,intensively produced crop.
B) requires large inputs of labor,small plots,and high reliance on fertilizers.
C) involves product diversification with grain,vegetables,and animals-all part of the farm economy.
D) has spread to marginal lands as population pressure has increased.