Form/Musical Form
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Answer:
The Romans also took advantage of the possibilities afforded to architects by the innovation of the true arch (in comparison to the corbeled arch where stones are laid so that they tilt slightly towards the middle as they move upwards). True arches can span more distances than a simple post-and-lintel.
I believe it's Wool, though I could be extremely wrong
The answer is number 4, because people valued convenience over doing the work themselves
