GMAT Sentence Correction (SC) | Re: The primary catalyst fueling the rapid spread of wind farms across the

The primary catalyst fueling the rapid spread of wind farms across the country – from offshore platforms along the coasts through the vast deserts and plains –has been a combination of federal tax incentives and state mandates requiring utilities to raise renewable power to increasing percentages of their overall energyproduction.

A. has been a combination of federal tax incentives and state mandates requiringutilities to raise renewable power to increasing percentages oftheir
B. have
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