Test: GMAT Verbal

After replacing her old air conditioner with a new, energy-efficient unit, Paula’s electric bills increased.

1.

Each of the following, if true, contributes to an explanation of the increase mentioned above EXCEPT: 

Following the installation of her new air conditioner, Paula's neighborhood experienced a prolonged and severe heat wave, requiring heavy use of the new unit.

Paula's electricity costs increased by 15 cents per kilowatt hour after she replaced her air conditioner.

Paula installed an electricity-intensive indoor tanning bed after she replaced her air conitioning unit.

The new air conditioner uses a smaller share of the electricity used by Paula’s home than did the old unit.

Soon after the new air conditioner was installed, Paula adopted a child, doubling the size of her household.

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