Which of the following statements is true?

a)	Economists define quality from the perspective of consumers, not from the clinical perspective common in healthcare.

b)	Higher input prices mean higher costs.

c)	Advances in technology always reduce the cost of an activity, but volumes may increase enough to increase spending.

d)	If higher quality does not cost more, failure to provide it demonstrates inefficiency.

e)	Increases in efficiency always reduce the cost of an activity.

f)	All of the above.

g)	None of the above.