A sports stadium has two prices of seats. The cheaper seats are $10 and the more expensive seats are $20. When the prices of all seats are increased by 10%, the effects on demand are a fall of 5% for the cheaper seats and a fall of 12% for the more expensive seats.
What describes the responsiveness of demand to the change in price?

1 )
A
2 )
B
C
4 )
D
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