When trading corn, an initial maintenance requirement of $$4,000$ exists on a contract to $100,000$ bushels of corn at $$6\mathrm{.}28$ per bushel. There is a maintenance margin of $$3,200.$ If the price of corn increases, how does the use of margin affect return?

a$.$ Return is dampened in a positive direction.

b$.$ Return is dampened in a negative direction.

c$.$ Return is amplified in a negative direction.

d$.$ Return is amplified in a positive direction.