Big Book GRE Test 19 Section 5 Exercise 8

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Hello everyone, I could really use some insight here. I have tried to plug in different numbers with different extremes and I always get answer A (which is not correct). Thank you in advance!

Nevermind, I used x=1 y=2 and x=0.1 and y=0.11 and it gave me two different answers, so D holds.

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