We distinguish between the long-run aggregate supply curve and the short-run aggregate supply curve. In the long run Select one: O a technology is fixed but it is not in the short run. O b. real GDP equals potential GDP. O c. the aggregate supply curve is horizontal while in the short run it is upward sloping. O d. the price level is constant but in the short run it fluctuates. When interest rates fall Select one: O a. firms want to borrow more for new plants and equipment and households want to borrow less for homebuilding O b. firms want to borrow less for new plants and equipment and households want to borrow more for homebuilding. O c.firms want to borrow less for new plants and equipment and households want to borrow less for homebuilding O d. firms want to borrow more for new plants and equipment and households want to borrow more for homebuilding