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In 2022, researchers rediscovered ancient indigenous glyphs, or drawings, on the walls of a cave in Alabama. The cave’s ceiling was only a few feet high, affording no position from which the glyphs, being as wide as ten feet, could be viewed or photographed in their entirety. However, the researchers used a technique called photogrammetry to assemble numerous photos of the walls into a 3D model. They then worked with representatives of tribes originally from the region, including the Chickasaw Nation, to understand the significance of the animal and humanoid figures adorning the cave.
According to the text, what challenge did the researchers have to overcome to examine the glyphs?
Explanation
Choice D is the best answer. The text describes the very low ceiling of the cave, making it impossible to photograph the very wide glyphs all at once.
Choice A is incorrect. The text doesn’t say this. It never suggests that the cave was remote or difficult to access, just that the cave itself was difficult to photograph well. Choice B is incorrect. The text doesn’t say this. The glyphs were so wide that they couldn’t be photographed completely. Choice C is incorrect. The text states the opposite of this. The researchers “used a technique called photogrammetry to assemble numerous photos of the walls into a 3D model.”