Let Aggregate Demand Fall in a World Characterized by a Lucas

Let aggregate demand fall in a world characterized by a Lucas aggregate supply curve where price level changes are accurately perceived. You, in that case, expect

A) a large change in GDP coupled with a small increase in prices.
B) a large change in GDP coupled with a small reduction in prices.
C) a small change in GDP coupled with a large increase in prices.
D) a small change in GDP coupled with a small reduction in prices.
E) a small change in GDP coupled with a large reduction in prices.