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Earth Science
The deepest hole in the Earth, the ‘Kola Superdeep Borehole’ on Russia’s Kola Peninsula, is about ____ feet deep.
Correct answer: D
Explanation and memory cue
The Kola Superdeep Borehole, located on Russia's Kola Peninsula, is the deepest hole ever drilled into the Earth. It reached a maximum true vertical depth of approximately 12,262 meters, which is about 40,230 feet. Among the given options, 40,000 feet (option D) is the closest to the actual depth, making it the correct answer. The previously stated correct answer 'C' (30,000 feet) is incorrect based on verified data from authoritative sources such as Wikipedia.