Because Marginal Product Decreases as Input Is Increased

Multiple Choice

Because marginal product decreases as input is increased,

A) nothing is implied about how much input is required to produce one more unit of output.
B) it takes decreasing amounts of input to produce one more unit of output.
C) it takes increasing amounts of input to produce one more unit of output.
D) the amount of input it takes to produce one more unit of output does not change.
E) it takes zero input to produce one more unit of output.