Suppose the price level is measured along the vertical axis on a graph. When the price level changes, there will be a

A) rotation of the curve.
B) shift of the curve.
C) movement along the curve.
D) change in the slope of the curve.

A change in the price level, when plotted on a graph with the price level on the vertical axis, results in a movement along the curve, not a shift or rotation of the curve or a change in its slope. This is because the curve itself represents a relationship at various price levels, so a change in price moves the point of observation along the existing curve.