Hector is studying yield curves. One curve is downward sloping, and one curve is upward sloping. What economic change might produce these two curves? The beginning of a period of economic growth often causes a yield curve to be downward sloping rather than the normal upward sloping. The beginning of a period of economic growth often causes a yield curve to be upward sloping rather than the normal downward sloping. O The beginning of a recession often causes a yield curve to be downward sloping rather than the normal upward sloping. The beginning of a recession often causes a yield curve to be upward sloping rather than the normal downward sloping. 4