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E has 2 problems... first of all _____, were the Maya is incorrect modifier...
second, even if you remove the comma "without the benefit of the wheel or animal transport" is splitting the verb and subject... WHO BUILT... I would replace it towards the end to make the sentence correct because it modifies the verb BUILT... (built how?... w/out the benefit of the wheel... etc) By having it the way it is in E, it seems like the Maya were w/out the benefit of the wheel... etc
I thought the modifier was the only issue and if I got rid of the comma, it might be ok. But now I understand that we should keep the subject and the verb as close as possible, which option c does very well.
HBS: Reimagining Capitalism: Business and Big Problems : Growing income inequality, poor or declining educational systems, unequal access to affordable health care and the fear of continuing economic distress...