What is the main idea of this selection?
A Building an Earthscraper involves the same construction principles as those used for building the pyramids.
B Many architects and engineers are predicting that Earthscrapers will soon replace skyscrapers.
C Building an Earthscraper could prove to be a practical solution to a difficult urban problem.
D Many architects and engineers doubt that the obstacles to building an Earthscraper can be overcome.
What is the main idea of this selection?
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The correct answer is C: Building an Earthscraper could prove to be a practical solution to a difficult urban problem.
Explanation: This option suggests that the Earthscraper concept addresses specific challenges in urban settings, such as space limitations and environmental concerns. It reflects a forward-thinking approach to architecture, highlighting potential benefits rather than just challenges or comparisons to other types of buildings.