Writing Question help!

<p>hey guys if anyone could explain this writing question i would gladly appreciate it</p>

<p>Practice Test 3 Section 6 number 11 in the Blue Book</p>

<p>Twice as many bird species inhabit Ecuador "as in" North America</p>

<p>The answer is B "as inhabit"</p>

<p>I feel like this is a comparison error but im not entirely sure why :(</p>

<p>by the way i ran through nearly all the questions in the Blue Book for the writing section at least, and i was wondering if anyone could recommend me a site or another book for sat writing questions only thanks ^_^</p>