Many economists consider medical care a superior good. Which of the following statements is true regarding a superior good?

Group of answer choices

a. Consumers want more of a superior good regardless of its price.

b. When the price of a superior good increases, consumers demand more of it.

c. As consumer income increases a larger percentage of that income is spent on superior goods.

d. A superior good has an income elasticity of demand greater than one.

e. Both c and d are true of superior goods.