If the Demand Curve Is Linear and Downward Sloping,which of the Following

If the demand curve is linear and downward sloping,which of the following statements is not correct?

A) Demand is more elastic on the lower part of the demand curve than on the upper part.
B) Different pairs of points on the demand curve can result in different values of the price elasticity of demand.
C) Different pairs of points on the demand curve cannot result in different values of the slope of the demand curve.
D) Starting from a point on the upper part of the demand curve, an increase in price leads to a decrease in total revenue.