If a regression analysis of store operating costs showed an "a" value of $12,000 and a "b" value of -$0.036, it would indicate that:

A) the variable costs of the store appear to be inversely related to the store's sales.

B) The fixed costs were negative.

C) The regression makes no sense.

D) As sales go up, store operating costs go up as well.

E) None of the above are correct.