Tony notes that an electronics store is offering a flat $20 off all prices in the store. Tony reasons that if he wants to buy something with a price of $50, then it is a good offer, but if he wants to buy something with a price of $500, then it is not a good offer. This is an example of:

A.the proper application of the Cost-Benefit Principle.

B.inconsistent reasoning; saving $20 is saving $20.

C.rational choice because saving 40% is better than saving 4%.

D.inconsistent reasoning because prices are sunk costs.

正确答案：inconsistent reasoning; saving $20 is saving $20.