The text boxes below have been placed in a random order. Reorder the paragraphs.
A. Researchers have developed a system that can 3-D print the basic structure of an entire building.
B. Ultimately, the scientist say, this approach could enable the design and the construction of new buildings that would not be feasible with traditional building methods.
C. Even the internal structure could be modified in new ways; different materials could be incorporated as the process goes along.
D. Structure built with this system could be produced faster and less expensively than traditional construction methods allow.
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