18. If the actual price level is 165, but people had been expecting it to be 160, then
(A) the quantity of output supplied rises, but only in the short run.
(B) the quantity of output supplied rises in the short run and the long run.
(C) the quantity of output supplied falls, but only in the short run.
(D) the quantity of output supplied falls in the short run and the long run.

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