Which of the following statements about the price elasticity of demand is correct?
选项：

A:The price elasticity of demand for a good measures the willingness of buyers of the good to buy less of the good as its price increases.
B:Price elasticity of demand reflects the many economic, psychological, and social forces that shape consumer tastes.
C:Other things equal, if good x has close substitutes and good y does not have close substitutes, then the demand for good x will be more elastic than the demand for good y.
D:All of the above are correct.