Assuming That Wheat and Corn Can Both Be Grown on the Same

Assuming that wheat and corn can both be grown on the same type of land, a decrease in the price of corn, other things being equal, will cause a(n) :

A) downward movement along the supply curve for wheat.
B) upward movement along the supply curve for wheat.
C) rightward shift in the supply curve for wheat.
D) leftward shift in the supply curve for wheat.