The Anasazi settlements at Chaco Canyon were built on a spectacular scale, with more than 75 carefully engineered structures, of up to 600 rooms each, were connected by a complex regional system of roads.
scale, with more than 75 carefully engineered structures, of up to 600 rooms each, were
scale, with more than 75 carefully engineered structures, of up to 600 rooms each,
scale of more than 75 carefully engineered structures of up to 600 rooms, each that had been
scale of more than 75 carefully engineered structures of up to 600 rooms and with each
scale of more than 75 carefully engineered structures of up to 600 rooms, each had been
CHOICE A-run-on
CHOICE CDE- 'scale of' doesn't make sense
CHOICE C- you can't say 'each that had...' (can't follow 'each' with a relative pronoun - if you're going to use a relative pronoun, it has to come directly after the thing it's trying to modify)
CHOICE CE- no justification for using the past perfect ('had been') - that verb, if there's a verb there at all, should be in the simple past (the same tense as everything else in the sentence, because everything described in the sentence is contemporaneous)
CHOICE CE- it doesn't make sense to use 'each' AFTER the comma, because it's not true that each structure was connected with a road system. instead, the road system connected all of the structures with each other, which is nowhere close to the same thing. (having 'each' BEFORE the comma makes sense, because it's actually true that each of the structures comprised up to 600 rooms.)
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